Слова на букву cycl-eleu (732) Dictionary of invertebrate zoology
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Слова на букву cycl-eleu (732)

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n. [Gr. kyklos, circle; morphe, form] A seasonal nongenetic change of phenotype in marine zooplankton, as certain cladocerans and rotifers.
См. cyclopic.
adj. [Gr. kyklos, circle; ops, eye] A single median eye developed under certain artificial conditions, or a mutation in place of the normal pair.
cyclopoid larva
(ARTHROPODA: Insecta) The larva of proctotrupoid Hymenoptera with a hypermetamorphosis, characterized by a swollen cephalothorax, large sickle-like mandibles and a pair of ...
cyclops stage
(ARTHROPODA: Crustacea) Post-metanaupliar stage of a copepod.
n. [Gr. kyklios, circular; systema, placed together] (CNIDARIA: Hydrozoa) In milleporinan medusae, consisting of several dactylopores surrounding a central gastropore.
adj. [L. cydarum, kind of ship; forma, shape] Globose or orbicular, but truncated at opposite ends.
cydippid larva
(CTENOPHORA) A larva with developmental stages resembling adult cydippids, and thus may be larval stages of other orders.
adj. [Gr. kylindros, cylinder] Pertaining to or like a cylinder.
adj. [Gr. kylindros, cylinder] Round, cylinder-like with parallel sides.
adj. [Gr. kylindros, cylinder; konos, cone] Having the shape of a cylinder terminating in a cone.
n. [Gr. kymbe, small boat] (PORIFERA) A spicule shaped like a boat.
adj. [Gr. kymbe, small boat; L. forma, shape] Boatshaped; navicular; scaphoid.
n. [Gr. kymbe, small boat] (ARTHROPODA: Chelicerata) The boat-shaped tarsus of the copulatory pedipalpus in certain spiders; see paracymbium.
adj. [L. cyma, young shoot] (CNIDARIA: Hydrozoa) Pertaining to the budding zone that continues to bud and form branches.
adj. [Gr. kyon, dog; pous, foot] Having non-retractile claws.
cyphonaute larva
pl. -nautae (BRYOZOA: Gymnolaemata) A freeswimming larva with a triangular profile and strongly compressed laterally; most of the body is enclosed by a bivalve shell.
n. [Gr. kyphos, bent; pous, foot] (ARTHROPODA: Diplopoda) In Julidae, large, sclerotized bases of aborted appendages behind the second pair of legs.
adj. [Gr. kyphos, bent; soma, body] (ARTHROPODA: Insecta) Pertaining to larvae with the dorsal surface curved and the ventral surface straight or flat.
adj. [L. Cypris, Venus; forma, shape] Oval, rolled inward from each side.
n. [L. Cypris, Venus] (ARTHROPODA: Crustacea) In some rhizocephalan barnacles, larval stage after cypris and before kentrogon.
n. [L. Cypris, Venus] (ARTHROPODA: Crustacea) In bivalve barnacles, the nonfeeding larval stage prior to metamorphosis into the cyprid, kentrogon and adult stage, so ...
cyrenoid type
see corbiculoid teeth.
adj. [Gr. kyrtos, curved; konos, cone] Cone-shaped.
adj. [Gr. kyrtos, curved; konos, cone; eidos, like] Approaching a cone in shape, but with convex sides; see conoid, coeloconoid.
n. [Gr. kyrtos, curved; kytos, container] Protonephridial system with a fenestrated area in the basal part of the nephridial canal in many groups of invertebrates.
n. [Gr. kyrtos, curved; ops, eye] (ARTHROPODA: Crustacea) In Euphausiacea, the fifth larval stage in which the antenna becomes modified and ceases to serve in locomotion and ...
n. [Gr. kystis, bladder] 1. A small sac, capsule or bladderlike structure. 2. A protective covering formed about an organism during unfavorable conditions or reproduction. ...
n. [Gr. kystis, bladder] 1. A small sac, capsule or bladderlike structure. 2. A protective covering formed about an organism during unfavorable conditions or reproduction. ...
n. [Gr. kystis, bladder; akantha, thorn] (ACANTHOCEPHALA) A juvenile having all adult structures, except the reproductive system is immature; proceeds to a quiescent ...
n. [Gr. kystis, bladder; en in; kyma, swollen] A parenchyma with large vesicular cell structure.
n. [Gr. kystis, bladder; en, in; kytos, container] (PORIFERA) A polysaccharide-secreting cell in fresh-water sponges with contents enclosed in a single vesicle.
adj. [Gr. kystis, bladder] Contained in a gall or cyst.
cysticercaria cercaria
(PLATYHELMINTHES: Trematoda) In Azygiidae, a large cercaria of the cystophorous type, with a short flat tail ending in a pair of flat clapper-like appendages ...
pl. of cysticercus.
adj. [Gr. kystis, bladder; kerkos, tail; eidos, form] (PLATYHELMINTHES: Cestoda) A tapeworm cyclophyllidean metacestode developing from an oncosphere that has penetrated ...
n. [Gr. kystis, bladder; -osis, suff. denoting disease] An infection with one or more cysticerci.
n.; pl. -cerci [Gr. kystis, bladder; kerkos, tail] (PLATYHELMINTHES: Cestoda) A tapeworm metacestode with an introverted, invaginated scolex that forms on a germinative ...
n. [Gr. kystis, bladder] (BRYOZOA) The external wall of a zooid.
cystidean larva
(ECHINODERMATA: Crinoidea) A larval stage in which the stalk appears, but the arms are not yet present.
n. [Gr. kystis, bladder; phragma, fence] (BRYOZOA) The lateral skeletal partition curving from the zooecial wall into the chamber.
cystocercous cercariae
see cystophorous cercariae.
n. pl. [Gr. kystis, bladder; kytos, container] (ARTHROPODA: Insecta) 1. A type of specialized granular hemocyte that has a small, sharply defined nucleus and a pale, ...
cystogenic cells
(PLATYHELMINTHES: Trematoda) Secretory cells in a cercaria that produce a metacercarial cyst.
cystoid body
(NEMATA) In the genus Meloidoderita, the tanned uterus (light to dark brown in color), irregular to roundoval, filled with eggs and larvae.
cystoidal diaphragm
(BRYOZOA: Stenolaemata) A transverse skeletal structure formed by two diaphragms in contact part way across the zooecial chamber and enclosing the compartment between them.
n. [Gr. kystis, bladder] (CNIDARIA: Hydrozoa) A colony dactylozooid modified for excretory function.
cystophorous cercaria
(PLATYHELMINTHES: Trematoda) 1. A large cercaria with a bulbous chamber at the anterior end of the tail into which the body can be withdrawn; also called cystocercous, ...
n. [Gr. kystis, bladder; poros, pore] (BRYOZOA) Extrazooidal skeletal structures composed of adjacent and superimposed vesicles.
n. [Gr. kystis, bladder; zoon, animal] (PLATYHELMINTHES: Cestoda) The body portion of a metacestode; a juvenile tapeworm.
n. [Gr. kytos, container; aster, star] An aster-like figure in animal cells containing the centrioles, formed in cytoplasm outside the nucleus before mitosis and meiosis. ...
see cytoclesis.
see centrosome.
n. [Gr. kytos, container; chemeia, pert. chemistry] The science of cell chemistry.
n. [Gr. kytos, container; chimaera, monster] The same combination of tissues or parts of tissue having different chromosome numbers.
n. [Gr. kytos, container; chroma, color] Any of a class of hemoproteins that function in electron and/or hydrogen transport because of a reversible valency change of their ...
adj. [Gr. kytos, container; L. caedere, to kill] That which kills cells.
see cytokinesis.
n. [Gr. kytos, container; klesis, summons] A cell group that influences the development or differentiation of surrounding cells; cytobiotaxis; see organizer.
n.; pl. -cocci [Gr. kytos, container; kokkos, seed] The nucleus of a cytula.
n. [Gr. kytos, container; gamos, marriage] Cell fusion or conjugation.
n. [Gr. kytos, container; genesis, beginning] The comparative study of chromosomal mechanisms and behavior in populations and taxa, and their effect on inheritance and ...
n. [Gr. kytos, container; gonos, progeny] Reproduction by single cells.
n. [Gr. kytos, container; kinesis, movement] The changes occurring in the protoplasm of the cell outside of the nucleus during cell-division.
n. [Gr. kytos, container; lemma, skin] Plasma membrane.
n. [Gr. kytos, container; logos, discourse] The study of the structure and physiology of a cell.
n. [Gr. kytos, container; lysein, to dissolve] Cell dissolution or degeneration.
n. [Gr. kytos, container; L. membrana, skin] The basic unit of the membrane system of a cell; unit membrane.
n. [Gr. kytos, container; morphe, form] All changes in cells or generations of cells from undifferentiated stage to death; cellular change.
n. [Gr. kytos, container; pempsis, mission] Passage into, through and from a cell or capillary by a particle.
n. [Gr. kytos, container; phagein, to eat] Cells feeding on cells.
n. [Gr. kytos, container; plasma, formed or molded] The protoplasm of a cell excluding the nucleus, usually a slightly viscous fluid with inclusions suspended in it; the ...
cytoplasmic factor
A genetic factor in the cytoplasm.
cytoplasmic inheritance
Inheritance of characters whose determinants are not located on the chromosomes.
n. [Gr. kytos, container] Non-specific cellular ingestion or egestion processes by pinocytosis or phagocytosis.
n. [Gr. kytos, container; solvere, to set free] Ground protoplasm of the cell exclusive of organelles or other particles.
n. [Gr. kytos, container; soma, body] A non-specific name for membrane bound polymorphous bodies in the cell cytosol.
adj. [Gr. kytos, container; statikos, standing] Any agent that inhibits cell growth and multiplication.
n. [Gr. kytos, container; taxis, arrangement; nomos, law] A method of taxonomy based on size, shape and number of chromosomes in somatic cells; see taxonomy.
n. [Gr. kytos, container; toxikon, poison] Cell poison.
n. [Gr. dim. kytos, container] The fertilized egg cell or parent cell.
D-shaped larval stage
(MOLLUSCA) A larva in the form of a D, the back of which is the long, straight hinge; protostracum.
adj. [Gr. dakryon, tear; eidos, form] Tear-shaped.
n.; pl. -tyles [Gr. daktylos, finger] 1. A finger or toe; a dactylus; a pretarsus; a digit. 2. (ARTHROPODA: Crustacea) The ultimate segment of a thoracopod; a ...
n. [Gr. daktylethra, finger sheath] (BRYOZOA: Stenolaemata) A degenerate feeding zooid closed by a terminal diaphragm, or an aborted, shortened polymorph.
n. [Gr. daktylos, finger; gnathos, jaw] (ARTHROPODA) The distal segment of a maxilliped.
adj. [Gr. daktylos, finger; eidos, form] Finger-like.
n. [Gr. daktylos, finger; pous, foot] (ARTHROPODA) 1. The terminal segment of a generalized leg or appendage usually claw-like; the pretarsus. 2. For Crustacea see ...
n. [Gr. daktylos, finger; poros, passage] (CNIDARIA: Hydrozoa) An opening in the coenosteum of a milleporinan coral for a dactylozooid.
n. [Gr. daktylos, finger; zoon, animal] (CNIDARIA: Hydrozoa) In colonial hydrozoans, a hydroid modified for protection and the capture of prey; protective polyp, zooid ...
n. [Gr. daktylos, finger] 1. (ARTHROPODA: Insecta) A structure of the tarsus. 2. (MOLLUSCA: Cephalopoda) see tentacle.
n. [OF. dancer, dance] (ARTHROPODA: Insecta) Communicative movements of honeybees, usually performed on their combs.
adj. [Gr. daphne, laurel] (ARTHROPODA: Crustacea) Any water flea, esp. those in the genus Daphnia.
n. [OF. dard, dagger] 1. Anything that pierces or wounds. 2. (ECHINODERMATA) The spiculum. 3. (MOLLUSCA: Gastropoda) A sting or dart of certain snails.
dart sac
(MOLLUSCA: Gastropoda) A muscular caecum of the vagina that produces a fine-pointed calcareous shaft that is \'shot\' by partners before courtship, lodging in the ...
n. [C. Darwin, English naturalist] The theory of species origin through natural selection working on small inherited differences in individuals.
dauer larvae
(NEMATA) A quiescent stage entered by some parasitic larvae while enclosed in the cast cuticle of the previous stage.
n. [Ger. dauer, duration; L. modificare, to regulate] Character change usually induced by extreme environmental factors that survives for several generations.
n. [A.S. dohter, daughter] The offspring of a division, not implying sex, such as in daughter cells or daughter nucleus; a daughter chromosome applies to chromatids after ...
daughter cells
The two cells resulting from division of a single cell.
daughter cyst
(PLATYHELMINTHES: Cestoda) Fluid filled bladder with protoscolesces formed by exogenous budding of the germinal epithelium of a unilocular hydatid cyst.
(ARTHROPODA: Insecta) The apposition eyes adapted for use in daytime when light is abundant.
De Vriesianism
Hypothesis that evolution in general, and speciation in particular, are the results of drastic mutation; see saltation.
См. dealated.
adj. [L. de, away from; alatus, winged] (ARTHROPODA: Insecta) Loosing wings, as ants and termites, by casting or breaking off; dealation n.
n. [A.S. death, death] Irreversible cessation of the activities and breakdown of the structure of protoplasm.
adj. [L. de, away from; auratus, golden] Having a gold color that appears rubbed or worn.
n. [Gr. deka, ten; akantha, thorn] (PLATYHELMINTHES: Cestoda) A ten-hooked larva that hatches from the egg; a lycophore.
n. [L. de, away from; calcarius, of lime; ficare, to make] Loss of calcium salts from living tissues; removing calcium salts from tissues with acids.
adj. [Gr. deka, ten; meros, part] Having ten parts or divisions.
decapodid larvae
(ARTHROPODA: Crustacea) Larvae of Decapoda that swim with their pleopods; a megalopa stage larva.
adj. [Gr. deka, ten; theke, case] (ANNELIDA: Oligochaeta) Earthworms having ten spermathecae, usually in five pairs.
adj. [L. de, away from; Gr. kephale, head] (ARTHROPODA: Insecta) Having a prognathous head with structures dividing the foramen.
adj. [L. deciduus, falling off] Having a part or parts that may fall off or be shed.
n. [D. dek, cover] (MOLLUSCA) A septum or small sheet of shelly substance in the umbonal region connecting the anterior and posterior ends of a valve.
adj. [L. de, away from; clinatus, sloping] Bending aside in a curve with the apex downward.
См. declivous.
adj. [L. de, away from; clivis, hill] Sloping downward; gradually descending. decollate adj. [L. de, away from; collum, neck] (MOLLUSCA: Gastropoda) Pertaining to cut or ...
see desynapsis.
v.t. [L. de, away from; cortex, bark] To divest of the exterior coating; deprived of the cortex or outer coat. decticous adj. [Gr. dektikos, biting] (ARTHROPODA: Insecta) ...
adj. [L. decumbere, to lie down] Bending downward; upright at the base and bending down at the tip.
adj. [L. de, away from; curvus, bend] Bowed or curved downward.
adj. [L. decussatus, formed crosswise like the letter X] 1. Intersected; striations or bristles crossing at acute angles forming a series of X\'s. 2. (ARTHROPODA: Insecta) ...
n. [L. de, away from; determinare, to limit] Reversion of cells to their embryonic state.
n. [L. de, away from; differentia, difference] Loss of traits of specialized cells formed during the course of differentiation.
n. [L. de, away from; Fauna, deity of herds and fields] To remove from an organism its commensalistic or mutualistic microfauna, for which the organism ordinarily serves as a ...
v.i. [L. defaecare, to void excrement] To void feces.
adj. [L. de, away from; ferre, to carry] Carrying away; deferent duct.
n., pl. -cies [L. deficiens, wanting] Structural change resulting in the loss of a terminal part of a chromosome.
n. [L. definitus, limited] 1. Limitation; defining limits. 2. In taxonomic work, the formal statement of characters delimiting the taxonomic category.
definitive host
One in which the terminal (frequently sexual) stage of the parasite occurs; primary host; see intermediate host.
definitive reservoir
A host or location in which a natural supply of the terminal stage (frequently sexual) of a parasite occurs.
adj. [L. de, away from; flectere, to bend] 1. Bent backward or to one side or downward. 2. (ARTHROPODA: Insecta) Wings having the inner margins lapping and the outer margins ...
deflected front
(ARTHROPODA: Crustacea) In some Decapoda, the broadly downturned front margin of the carapace.
adj. [L. de, away from; flectere, to bend] Bent abruptly downward.
n. [L. de, away from; folium, leaf] Any agent, animal or chemical that destroys the leaves of plants.
adj. [L. deformis, misshapen] 1. Disarranging or setting in an unusual form. 2. (ARTHROPODA: Insecta) The knotted or twisted antennae in male Meloidae.
v.i. [L. degenerare, to depart from its kind] To retrogress to a lower type; to deteriorate.
degenerate code
The genetic code in which more than one nucleotide triplet codes for the same amino acid.
n. [L. degenerare, to depart from its kind] A progressive deterioration to a less specialized or functionally less active form; retrogressive development.
n. [L. dehiscere, to split open] The cracking, splitting or tearing of an opening in an organ or structure along lines of weakness; dehiscent adj..
see cervical papillae.
n. [L. de, away from; lamina, a thin plate] 1. Split or divided into layers, as cells forming a new layer. 2. Gastrulation in which the endoderm is split off as a layer ...
n. [L. de, away from; limes, boundry] 1. Setting or marking a boundry. 2. In taxonomy, a formal statement of the characters of a taxon that establishes its limits; see ...
n.; pl. -ria [Gr. 4th letter, delta; thyrion, door] (BRACHIOPODA) The central triangular notch in the ventral valve, open to the hinge line; facilitating the passage of the ...
deltidial plates
(BRACHIOPODA) A plate or pair of plates growing medially from the margin of the delthyrium, almost or completely closing it.
n.; pl. -tidia, [Gr. 4th letter Δ, delta; -idion, dim.] (BRACHIOPODA) A plate that closes off the delthyrium, in some forms there are two plates; also called ...
adj. [Gr. 4th letter Δ, delta; eidos, shape] Triangular in shape.
demanian system
(NEMATA) A complex system consisting of paired efferent tubes connecting the intestine and uteri with one another and sometimes posteriorly with the exterior; thought to ...
demarcation line
(MOLLUSCA: Bivalvia) Imaginary line joining points on the beak with points of maximum transverse growth of the shell margin; forms dorsoventral profile.
n. [Gr. demos, people] A population within a species; an assemblage of potentially interbreeding individuals at a given locality.
adj. [L. de, away from; mergere, to plunge] Living on or near the bottom of a lake or sea.
n. pl. [Gr. demi, half; branchia, gills] (MOLLUSCA: Bivalvia) A pair of ciliated gill filaments composed of two flat lamellae (inner demibranch and outer demibranch) in ...
n. [Gr. demi, half; OF. plate, flat] (ECHINODERMATA) A reduced ambulacral plate in a compound plate in the test.
n. [Gr. demi, half; pro, before; vinculum, bond] (MOLLUSCA: Bivalvia) One half of the median part of the hinge margin of the prodissoconch; see prodissoconch.
n. [Gr. demos, multitude; spongos, sponge] A class of sponges composed of spongin fibers alone or together with siliceous spicules that are differentiated into megascleres ...
adj. [L. de, away from; natare, to swim] Swimming, drifting or migrating with the current; see contranatant.
adj. [Gr. dendron, tree; L. forma, shape] Branched like a tree; dendroid.
n. [Gr. dendron, tree] Neural aborizations or branching fibrils that conduct impulses toward the neurocyte. dendritic adj..
see dendroid.
dendritic flame cells
(ACANTHOCEPHALA) Central canal from which many smaller canals separate and end in pouches containing cilia.
dendritic thickening
(BRYOZOA) Extreme skeletal thickening along axes of colony branches.
(ia) n. [Gr. dendron, tree; branchia, gills] (ARTHROPODA: Crustacea) A type of gill with lamellae divided into arborescent bundles.
n. [Gr. dendron, tree; gramma, written character] Any branching, tree-like diagram designed to indicate degrees of relationship.
adj. [Gr. dendron, tree; eidos, form] 1. Shrub-shaped; shaped like a small tree; dendriform. 2. (BRYOZOA) A solid ramose colony. 3. (PORIFERA) A sponge skeleton ...
see dendrite.
adj. [Gr. dendron, tree; phagein, to eat] Feeding on woody tissues.
adj. [Gr. dendron, tree; philein, to love] Living in woody tissue, or on trees.
adj. [L. de, away from; Gr. nematos, of thread] To divest of nematodes.
n. [OF. denzein, one living within] Any animal that has become naturalized.
n.; pl. dentes [L. dens, tooth] 1. A tooth or tooth-like process. 2. (ARTHROPODA: Insecta) a. In Collembola, the proximal segment of the furcula (springing fork). b. ...
n. pl. [L. dens, tooth] (ARTHROPODA: Insecta) Distinct thickenings of the margins of the incisurae of scale insects.
density-dependent factors
Factors (direct or inverse) whose effects on a population are dependent upon the density of that particular population.
density-independent factors
Factors whose effects on a population are not dependent upon the density of that particular population.
n. pl. [L. dens, tooth; cera, wax; os, mouth] (ARTHROPODA: Insecta) In coccoids, irregularities in the membrane surrounding the anus; denticulate pores.
dental plates
(BRACHIOPODA) Plates of secondary shell supporting the hinge teeth on the ventral valve.
dental sclerite
(ARTHROPODA: Insecta) The sclerite at each side of the base of the mandibular sclerite of muscid larvae.
dental sockets
(BRACHIOPODA) Excavations in the posterior margin of the brachial valve for reception of hinge teeth.
adj. [L. dens, tooth] Toothed, or with tooth-like processes.
Teeth with serrated dentations on the edges.
Teeth with a wavy indented margin.
adj. [L. dens, tooth; lira, furrow] Having teeth and fine raised lines or grooves.
n. pl. [L. denticulus, little tooth] 1. Small, tooth-like projections. 2. (ARTHROPODA: Crustacea) In cirripeds, toothlet on the sutural edge of the radius of the ...
dentigerous ridges
Elevations bearing small teeth or toothlike projections.
n. [L. dens, tooth] 1. All teeth including different forms, sizes, etc. 2. (MOLLUSCA: Bivalvia) A collective term including hinge teeth and sockets.
adj. [L. de, away from; nudus, bare] Divested of all covering.
adj. [L. de, away from; pauper, poor] 1. Impoverishing or exhausting. 2. Falling short of the natural size or development from being impoverished or starved. 3. (ARTHROPODA: ...
n. [L. de, away from; portare, to carry] (ARTHROPODA: Insecta) In social insects, the transport of adults or young to a new nest.
adj. [L. de, away from; pressus, bear down] 1. Pressed or kept down; sunken below the general surface. 2. (MOLLUSCA: Gastropoda) Refers to a shell low in proportion to ...
n. [L. de, away from; pressus, bear down] Any muscle that lowers or depresses any appendage.
depressor ani
(NEMATA) An H-shaped muscle that dilates the rectum and elevates the posterior lip of the anus.
depressor muscle crests
(ARTHROPODA: Crustacea) In balanomorph barnacles, elevated denticles or ridges on the inner surface of the tergum near the basicarinal angle for attachment of the depressor ...
n. [L. de, away from; puratus, cleanse] The act of cleansing; free from impurities.
derived character
Any character that differs materially from the ancestral condition.
См. dermis.
dermal cells
see cellulae.
dermal glands
1. (ARTHROPODA: Crustacea) A cell or cells in the epidermis traversed by canals communicating with the surface through fine ducts. 2. (ARTHROPODA: Insecta) Hypodermal ...
dermal pores
see cellulae.
n. pl. [Gr. derma, skin] (PORIFERA: Hexactinellida) Spicules at or beneath the dermal surface.
n. pl. [Gr. derma, skin; blastos, bud] (ARTHROPODA: Insecta) In an embryo, the outer thin layer of cells which form the ventral body wall; see neuroblasts.
n. [Gr. derma, skin; zoion, animal] Any animal parasitic on the skin.
n. [Gr. derma, skin] 1. The layer of the cuticle, laminated in structure, beneath the epidermis. 2. (PORIFERA) The extreme outer surface layer of membrane or reinforcement ...
dermoptic sense
The response of an animal to light or shadow after removal of eyes and other photosensors.
n. pl. [Gr. derma, skin; skleros, hard] (CNIDARIA: Anthozoa) Calcareous spicules (sclerites) of alcyonarian coral polyps, produced by scleroblasts embedded in the ...
n. [Gr. derma, skin; sketeto, dried hard] The exoskeleton.
adj. [L. de, away from; scandere, to climb] Directed downwards or caudad; detrorse.
n. [L. de, away from; Gr. skleros, hard] A reduction of sclerotin in sclerotized parts or structures.
n. [L. describere, to delineate] In taxonomy, a more or less complete formal statement of the characters of a taxon without delimiting it from coordinate taxa; see ...
n. [L. de, away from; segmentum, piece] The fusion of segments formerly separated.
adj. [L. desertum, a waste place; colere, to inhabit] Desert-inhabiting.
v. [L. desiccare, to dry up] To dry up; a process of preserving.
n. [L. desiccare, to dry up] An inactive dry state of various invertebrates, directly referable to extreme, dry conditions.
n.; pl. -mata [Gr. desmos, bond] (PORIFERA: Demospongiae) In Lithistida, branched, irregular interlocking megascleres consisting of layers of silica irregularly deposited ...
n. [Gr. desmos, bond; kytos, container] (PORIFERA) Long slender cells in the cortex and around the internal channels; fiber cells.
n. pl. [Gr. desmos, bond] (NEMATODA: Adenophorea) Transverse rings around the bodies of Desmoscolecida; concretion rings.
n. [Gr. desmos, bond; ergates, worker] (ARTHROPODA: Insecta) A form of ant intermediate between the typical worker and the soldier; can also be used to designate the ...
n. [Gr. desmos, bond; nema, thread] (CNIDARIA: Hydrozoa) A small nematocyst of hydras with a short unarmed spirally coiled tubule, which functions in entangling and ...
n. [Gr. desmos, bond; soma, body] 1. That portion of a cell membrane specialized for adhesion to a neighboring cell. 2. (ARTHROPODA: Insecta) An attachment area between ...
n. [Gr. desmos, bond; spongos, sponge] A class of sponges encompassing 90% of all existing sponges with ancestory tracing back to simple Cambrian sponges (500 million years). ...
Desor's larva
(NEMERTEA) Oval ciliated postgastral stage (in the egg) of Lineus ; develops like the pilidium larva.
n. [L. de, away from; squama, scale] Peeling or scaling off of cuticle or epidermis in flakes.
n. [L. de, away from; Gr. synaptos, joined together] Separation of paired chromosomes during the diplotene phase of the first meiotic division; desyndesis; deconjugation; ...
see desynapsis.
n. [L. de, away from; terminus, limit] A hypothetical unit of inheritance.
adj. [L. de, away from; terminus, limit] Having well-defined outlines or boundry limits.
n. [L. de, away from; terminus, limit] A process that initiates a specific pathway of development among those that are available to the cell or embryo.
n. [L. de, away from; torquere, to twist] 1. The process of twisting back or removing torsion; unwinding. 2. (MOLLUSCA: Gastropoda) A term used to describe the reversal of ...
n. [L. de, away from; toxicum, poison] Removal of toxic materials by metabolizing them.
См. detoxication.
adj. [L. detritus, worn away; Gr. phagein, to eat] Feeding on detritus.
n. [L. detritus, worn away; vorare, to devour] Any organism that feeds on detritus; detritivorous adj..
n. [L. detritus, worn away] An aggregate of fragmentary material, such as decomposing parts of plants and animals.
adj. [L. de, away from; versus, turn] Directed downward; see antrorse, retrorse.
see deutocerebrum, mesocerebrum.
n. [Gr. deuteros, second; plasma, formed or molded] A substance other than the nucleus and cytoplasm in a cell, esp. yolk in an egg cell; metaplasm; see energid.
n. [Gr. deuteros, second; stoma, mouth] True coelomates with radial cleavage of the egg, the blastopore becoming the anus, the coelom formed by enterocoely, including ...
n. [Gr. deuteros, second; tokos, birth] Parthenogenetic reproduction in which progeny of both sexes are produced from female gametes; see arrhenotoky, thelyotoky.
deutocerebral commissure
(ARTHROPODA) The connection between the sensory neuropiles on both sides of the brain.
deutocerebral region
(ARTHROPODA) That portion of a brain divided into dorsal sensory and ventral motor areas.
n. [Gr. deuteros, second; L. cerebrum, brain] (ARTHROPODA) The median region of a brain which receives the antennal nerves (first antennae in crustaceans, see ...
n. [Gr. deuteros, second; gyne, woman] A female of a species which is morphologically different from the primogyne and has no male counterpart; see protogyne.
n. pl. [Gr. deuterous, second; malon, cheek] 1. (ARTHROPODA: Symphyla) The second pair of mouth appendages in certain myriapods. 2. (CHAETOGNATHA) A broad plate formed by ...
n. [Gr. deuteros, second; nymphe, chrysalis] (ARTHROPODA: Chelicerata) The second stage nymph of arachnids.
См. deuteroplasm.
see pseudoscolex proscolex.
see subcapitular gutter.
n. [Gr. deuteros, second; L. ovum, egg] (ARTHROPODA: Chelicerata) a. The resting, incompletely developed stage following the shedding of the chorion of the egg of mites and ...
n. [F. developper, to unfold] The progressive production of the phenotypic characteristics of an organism.
developmental cycle
(ARTHROPODA: Insecta) The period between the laying of an egg and eclosion of the adult from the pupal case.
developmental homeostasis
The ability to produce a normal phenotype in spite of developmental or environmental disturbances.
n. [L. de, away from; via, way] Any animal which differs from corresponding developmental stages of others of the same species.
n. [L. de, away from; evolvere, to unroll] Retrograde development; degeneration.
n.; pl. -mae [Gr. dexios, on the right; torma, socket] (ARTHROPODA: Insecta) 1. A small sclerotic ring of scarabaeoid larvae, extending inward from the epipharynx, ...
adj. [Gr. dexios, on the right; trope, turn] A right turning spiral, as in shells.
adj. [L. dexter, right] Right-handed; to the right of the median line.
dextral gastropods
(MOLLUSCA) A gastropod with genitalia on the right side of the head-foot mass or pallial cavity; commonly the shell, when viewed with the apex uppermost, has the aperture ...
adj. [L. dexter, right] Pertaining to the right side of the body.
adj. [L. dexter, right; vertere, to twist] An organism spirally twisting to the right; see sinistrorse.
(ARTHROPODA: Chelicerata) Pertaining to chelicerae of spiders with the paturon projecting either forward or down with the fangs moving inward towards each other; see ...
see diaeresis.
adj. [Gr. dis, twice; aktis, ray] Being pointed at both ends.
diactinal monaxon
(PORIFERA) A monaxon that develops by growing in both directions, while originating from a central point; diactine; rhabdus.
see diactinal monaxon.
n. [Gr. dis, twice; triaina, trident] (PORIFERA) A form of triaene produced by loss of one ray from the cladome.
n. [Gr. diairein, to divide] (ARTHROPODA: Crustacea) A transverse groove on the posterior part of an exopod (rarely endopod) of a uropod appendage; occasionally dividing the ...

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