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genital armature
Those portions of the reproductive system directly involved in copulation.
genital atrium
(PLATYHELMINTHES) A small cavity in the body wall into which the male and female genital ducts open.
genital bursa
1. (ECHINODERMATA: Ophiuroidea) A genitorespiratory sac into which the gonads open; also used in respiration and brooding of larvae in brooding forms. 2; see bursa ...
genital canal
(ECHINODERMATA: Crinoidea) A canal in the arms in which the genital tube and cord lie.
genital chaeta
(ANNELIDA) A seta that functions in sexual reproduction; spermathecal chaeta; penial chaeta; penial seta.
genital chamber
(ARTHROPODA: Insecta) A copulatory invagination. a. In females, sometimes forms a tubular vagina that is often developed to form a bursa copulatrix. b. In males, a ventral ...
genital coelom
(MOLLUSCA) The lamina of the gonads.
genital cone
(ARTHROPODA: Crustacea) Single or paired testes openings on the eighth thoracic sternite of males.
genital cord
see genital rachis.
genital disc
(ARTHROPODA: Insecta) The imaginal disc from which the reproductive duct system and the external genitalia are formed in the vinegar fly, Drosophila.
genital duct
see gonoduct.
genital fossa
see fenestra.
genital groove
1. (ARTHROPODA: Chelicerata) In some female spiders, a cleft posterior to the epigynum into which the fertilization duct opens and through which the eggs pass. 2. ...
genital hamule
См. genital hook.
genital hook
see hamular hook, hamulus anterioris, hamulus posterioris.
genital lobe
(ARTHROPODA: Insecta) In Odonata genitalia, a lobe of the postero-lateral angles of the second abdominal segment.
genital opening
1. (ARTHROPODA: Chelicerata) a. In Acari, originally a transverse slit or trifid orifice associated with segment eight. b. In many actinotrochid Acari, it is found in the ...
genital organs
The reproductive organs.
genital papilla
См. genital papillae.
genital papillae
1. (ANNELIDA) A protuberance below the neuropodium where a reproductive duct opens. 2. (ARTHROPODA: Chelicerata) Endite of an opisthosomatic appendage; shaped like an ...
genital plates
1. (ARTHROPODA: Chelicerata) see epigynum. 2. (ECHINODERMATA: Echinoidea) Plates surrounding the periproct.
genital pleurae
see genital ridge.
genital pore
Genital opening.
genital pouch
(ARTHROPODA: Insecta) In certain Diptera, a pouch below the hypandrium receiving the tips of the surstyli and cerci.
genital primordium
In embryology, the originating cells leading to the development of the reproductive system.
genital rachis
(ECHINODERMATA: Crinoidea) Strands of gonocytes in the genital canal that traverse the arms to the gonad.
genital region
see urogastric lobe or area.
genital ridge
(ARTHROPODA: Insecta) In embryology, thickenings of the viseral (splanchnic) wall of the mesoderm in the abdominal region of the body in which the gonadal rudiments lie.
genital sac
see preputial sac.
genital segments
1. Body segments that bear copulatory organs. 2. (ANNELIDA) Usually segments X and XI. 3. (ARTHROPODA: Insecta) In males, abdominal segment IX; in females, abdominal ...
genital setae
see genital papillae, genital chaeta.
genital spike
(ARTHROPODA: Insecta) In Coccidae, the penis sheath.
genital stolon
see axial gland.
genital styles
see genostyles.
genital sucker
(PLATYHELMINTHES: Trematoda) A sucker around the genital pore.
genital supplements
see supplements.
genital tracheae
(ARTHROPODA: Chelicerata) In Acari, tracheae from the progenital chamber resembling gland ducts and often ending in caecae; the respiratory function is not proven.
genital tube
(ECHINODERMATA: Crinoidea) Suspended in the genital canal and carrying the rachis or genital cord.
genital tuft
see brushes.
genital tumescences
(ANNELIDA: Oligochaeta) In Lumbricidae, modified epidermis through which follicles of genital setae open.
genital valve
see lateral gonapophyses.
genital wings
see genital ridges.
genitalia
n. pl. [L. genitalis, pert. to procreation] 1. The sexual organs and associated structures. 2. (ARTHROPODA: Chelicerata) In male and female spiders, the sclerotized genital ...
genitointestinal canal
1. (NEMATA) see demanian system. 2. (PLATYHELMINTHES: Trematoda) A duct connecting the oviduct and intestine of certain Polyopisthocotylea monogeneans. genito-urinary see ...
genocline
n. [Gr. genos, race; klinein, to slope] Change within a continuous population in frequencies of genotypes in different geographical areas.
genocopy
n. [Gr. genos, race; L. copia, abundance] Production of the same phenotype by different genes (mimetic genes).
genodeme
n. [Gr. genos, race; demos, people] A deme.
genoholotype
n. [Gr. genos, race; holos, whole; typos, type] A typical species specified by the author as the generic type.
genolectotype
n. [Gr. genos, race; lektos, chosen; typos, type] The type of a genus selected from a series of species placed in the genus subsequent to the description.
genome
n. [Gr. genos, race; soma, body] The genes carried by a single gamete; the genetic contents of the chromosomes.
genostyles
n. pl. [Gr. genos, race; stylos, pillar] (ARTHROPODA: Insecta) In male Ephemeroptera, genital projections (consisting of 1-7 segments) initiated from the posterior corners ...
genosyntype
n. [Gr. genos, race; syn-, together; typos, type] Any one of a series of species that a genus is based upon when no one species was established as type; see type.
genotype
n. [Gr. genos, race; typos, type] 1. The genetic constitution of an organism or taxon, regardless of the outward appearance (phenotype) of the same. 2. Incorrect synonym for ...
genovertical plate
(ARTHROPODA: Insecta) In Diptera, the area on the head above the antenna and next to the compound eye; the orbital plate; the parafrontals.
genu
n.; pl. genua [L. genu, knee] 1. Any structure or organ with a knee-like bend. 2. (ARTHROPODA: Chelicerata) In Acari, the segment between the femur and tibia that is ...
genus
n.; pl. genera [L. genus, race] A taxon including one species or a group of species from a presumed common ancestor, separated from related similar genera by a decided gap; ...
genus novum
A new genus, never before described; gen. nov.
geobionts
n. [Gr. ge, earth; bios, life; on, a being] Organisms that permanently inhabit the soil and thereby affect its structure; see geocoles.
geobios
n. [Gr. ge, earth; bios, life] Soil life; terrestrial life; see edaphon.
geochronology
n. [Gr. ge, earth; chronos, time; logos, discourse] The measurement of time in relation to the evolution of the earth.
geocline
see cline.
geocoles
adj. [Gr. ge, earth; L. cola, inhabitant] Animals that spend only a part of their lives in the soil and affect its structure, aeration, etc; see geobionts.
Geoffroyism
see Lamarckism.
geographic barriers
A population or group of populations prevented by geographic barriers from free gene exchange with other populations of the same species; a geographic isolate; see climatic ...
geographic race
A geographically delimited race; usually a subspecies.
geographic variation
The differences between spatially segregated populations of a species.
geographical distribution
The range of a species.
geographical isolation
См. geographic barriers.
geology
n.; pl. -gies [Gr. ge, earth; logos, discourse] The science which treats of the structure and history of the earth.
geometrid
adj. [Gr. ge, earth; metron, measure] (ARTHROPODA: Insecta) A larva whose movements resemble a looping motion moving tail to head, such as the geometrid moth larva ...
geophagous
adj. [Gr. ge, earth; phagein, to eat] Feeding on earth.
geophilous
adj. [Gr. ge, earth; philein, to love] Living in or on the ground; ground loving, as land snails.
geotaxis
n.; pl. -taxes [Gr. ge, earth; taxis, arrangement] A tactic response with the force of gravitation as the stimulus. a. Positive geotaxis : toward the force of gravitation. ...
geotropism
n. [Gr. ge, earth; tropos, turn] Movement determined by the direction of gravitational force. geotropic a; see tropism.
geoxenes
n. [Gr. ge, earth; xenos, stranger] Organism occurring only occasionally in the soil showing little effect on the soil structure; see geobionts.
geratology
n. [Gr. geras, old age; logos, discourse] Study of degeneration and decadence of species with age; see gerontology.
germ band
(ARTHROPODA) In egg, the thickened area from which the embryo is produced; embryonic rudiment; germ disc; primitive streak.
germ cells
A reproductive cell in a multicellular organism; see somatic cells.
germ layer
see germinal layers.
germ plasm
Genetic material which forms the physical basis of inheritance and is passed from generation to generation.
germ tract
The complete detailed history of the germ cells from one generation to the next.
germ-balls
1. (ARTHROPODA: Insecta) Reproductive cells in some larvae from which other young larvae may be produced. 2. (PLATYHELMINTHES: Trematoda) Embryos in the redial stage.
germarium
n. [L. germen, bud] 1. The distal chamber of an ovarial or testicular tube containing the oogonia or spermatogonia. 2. An ovary. 3. An egg or sperm producing part of a ...
germiduct
n. [L. germen, bud; ducere, to lead] (PLATYHELMINTHES: Trematoda) The oviduct.
germigen
n. [L. germen, bud; Gr. genos, offspring] (PLATYHELMINTHES: Trematoda) The ovary.
germinal
adj. [L. germen, bud] Pertaining to a germ cell or embryonic structure; see soma.
germinal cell
Cells which produce gametes through meiosis, i.e., oocytes in females, spermatocytes in males; products of the germinal primordium.
germinal disc
see germ band.
germinal layers
Primary cell of the embryo: ectoderm, mesoderm, and endoderm, from which tissues and organs of the adult are formed; germ layer.
germinal mutations
Genetic alteration in cells destined to become germ cells.
germinal spot
The nucleolus of an ovum.
germinal streak
The primitive streak; see germ band.
germinal variations
A variation caused by some modification in the germ cells.
germinal vesicle
The diploid nucleus of a primary oocyte before formation of polar bodies.
germinal zone
That part of an ovarial or testicular tube where the oogonia or spermatogonia divide.
germogen
n. [L. germen, bud; genes, born] (MESOZOA: Rhombozoa) The central part of an infusorigen in the development of an axoblast.
germovitallarium
n.; pl. -vitellaria [L. germen, bud; vitellus, yolk] (PLATYHELMINTHES) Having the ovary differentiated into yolk- and egg-producing regions.
gerontic
adj. [Gr. gerontos, old man] Pertaining to decadence; old age; deteriorating.
gerontogeous
adj. [Gr. gerontos, old man; ge, earth] Belonging to the Old World or Eastern Hemisphere; see neogeic.
gerontology
n. [Gr. gerontos, old man; logos, discourse] The study of aging.
gerontomorphosis
n. [Gr. gerontos, old man; morphe, form] Evolution involving specialization and diminishing capacity for further evolutionary change.
gestation
n. [L. gestare, to bear] In viviparous animals, the period from conception to birth.
geusid
n. [Gr. geusis, taste] (NEMATA) Gustatory organ.
giant bud
(BRYOZOA: Gymnolaemata) Unpartitioned distal end growth in which the side walls grow faster than the internal transverse walls.
giant cell
A term applied to a host response in which a multinucleate mass of protoplasm or cytoplasm often acts as a preferred feeding site or "nurse cell"; see coenocyte, ...
giant chromosome
(ARTHROPODA: Insecta) In Diptera, a very large chromosome bundle that arises by repeated endoreplication of single chromatids.
giant fiber
Enlarged nerve fibers that transmit rapid impulses in certain mollusks, crustaceans, annelids, pogonaphorans and insects; giant fibre.
gibber
n. [L. gibbus, humped] A swelling or enlargement; a rounded protuberance.
gibbose
adj. [L. gibbus, humped] Very convex; humpbacked; embossed; swollen; a protuberance.
gibbous
См. gibbose.
Gicklhorn's organ
(ARTHROPODA: Crustacea) In Copepods, paired photoreceptors having two cells that closely resemble retinula cells, found in proximity to the frontal eye.
gigantism
n. [Gr. gigas, giant] Excessive growth of an organ or a complete organism to a large size. gigeriate adj. [L. gigerium, gizzard] (ANNELIDA) Having one or more gizzards in ...
gill
n. [ME. gile, gill] 1. An external respiratory organ of various aquatic invertebrates. 2. (ARTHROPODA) Brachia or plastron. 3. (ECHINODERMATA: Echinoidea) The ...
gill bailer
see scaphognathite.
gill bar
(MOLLUSCA: Bivalvia) Dorsoventral rodlike thickenings of a gill lamellae.
gill book
see book gill.
gill chamber
see branchial chamber.
gill filaments
1. Finger-like subdivisions of gills of various invertebrates. 2. (ANNELIDA) Finger-like extensions of the body wall that function in respiration.
gill lamellae
(MOLLUSCA: Bivalvia) Thin plates making up a gill.
gill plume
(MOLLUSCA: Gastropoda) Gill or ctenidium.
gill retractor
(MOLLUSCA: Bivalvia) When present, a muscle attaching one of the gills to the shell.
gill separator
see epipodite.
gill tuft
A group of mainly lateral, filamentous gills.
Gilson's glands
(ARTHROPODA: Insecta) In Trichoptera, thoracic glands homologized to coxal glands or nephridia.
gin-traps
(ARTHROPODA: Insecta) In certain coleopteran larvae, local sclerotization of opposable edges of adjacent abdominal segments, supposed organs of defense against arthropod ...
ginglymus
n. [Gr. ginglymos, hinge-joint] (ARTHROPODA: Insecta) In dicondylic jaws, a cavity or groove of the mandible that hinges on a convex process of the clypeus forming the ...
girdle
n. [A.S. gyrdel, a girdle] (MOLLUSCA: Polyplacophora) Flexible muscular integument, plain or leathery, or variously ornamented, holding the chiton valves in place; ...
gizzard
n. [OF. gezier, gizzard] 1. A grinding chamber of various invertebrates. 2. (ANNELIDA: Oligochaeta) A muscular area of the digestive system between intestine and crop. 3. ...
glabella
n. [L. dim. glaber, bald] (ARTHROPODA: Trilobita) A thickened, median elevated cephalic shield of trilobites.
glabrous
adj. [L. glaber, bald] Smooth, free of hair.
gladiolus
n. [L. dim. gladius, sword] The mesosternum.
gladius
n. [L. gladius, sword] (MOLLUSCA: Cephalopoda) In Sepiidae, Octopoda, and Teuthoidea, the horny endoskeleton or pen of endocochleates; the internal shell.
glairy
adj. [L. clarus, clear] Pertaining to glair, or white of an egg.
gland
n. [L. dim. glans, acorn] An organ or cell specialized for secretion, either for use in the body or for excretion.
gland cell
A single secreting cell.
gland of Leiblein
(MOLLUSCA) A gland connected to the modified esophagus by a duct that secretes a strong proteolytic enzyme in some predaceous mollusks and carbohydrase in vegetarians.
gland orifice
Any external opening for gland secretion.
gland shields
(ANNELIDA: Polychaeta) In tube-builders, a pair of large mucous-secreting pads which lay down a coating on the inner surface of the tube.
gland spines
(ARTHROPODA: Insecta) In Diaspidinae, small to large spines that are conical, bifid, or somewhat fimbriate at the tip and have one or more ducts that extend to the tip of the ...
gland tubercules
(ARTHROPODA: Insecta) In Diaspidinae, a gland spine that is short, basally swollen and sclerotized.
glandiform
adj. [L. dim. glans, acorn; forma, shape] Acornshaped.
glandilemma
n. [L. dim. glans, acorn; Gr. lemma, skin] The capsule of a gland.
glands of Batelli
(ARTHROPODA: Insecta) In Hemiptera, large hypodermal glands in the Cercopidae; formerly believed to produce the spittle.
glands of Filippi
see Lyonnet\'s gland.
glands of Morren
see calciferous glands.
glanduba
n.; pl. -ae [L. dim. glans, acorn] (ARTHROPODA: Insecta) In Hymenoptera, chitinized ring openings of the cutaneous wax glands found in most sawfly larvae.
glandulae accessoriae
(ARTHROPODA: Insecta) The accessory glands of the reproductive organs.
glandular
adj. [L. dim. glans, acorn] Having or bearing a gland or gland cell, i.e., hair, spines, etc.
glandular bristles
См. glandular hairs.
glandular hairs
1. Stout and rigid glandular setae. 2. (ARTHROPODA: Insecta) In Lepidoptera, the urticating hairs.
glandular organ
(SIPUNCULA) A prominent structure on the ventral, median part of the oral disc of pelagosphera larvae; lip gland.
glans
n. [L. dim. glans, acorn] (SIPUNCULA) The acorn-shaped posterior extremity of the trunk of some species.
glassy
adj. [A.S. glaes, glass] Vitreous; transparent; pellucid; clear.
glaucothoe
n. [Gr. glaukos, grey; thos, swift] (ARTHROPODA: Crustacea) In Decapoda, a postlarval stage in the development of Paguridae, equivalent to a megalopa.
glaucous
adj. [L. glaucus, bluish-green] Sea-green or pale bluish- green in color.
glenoid
cavity. 1. A depression for the fit of a condyle. 2. (ARTHROPODA: Chelicerata) In Acari, part of a condylar articulation.
glia
См. gliacytes.
gliacytes
n. [Gr. glia, glue] Nonnerve cells in the brain or glanglion, that may support the life processes of the neurons; neuroglia.
glial cells
См. gliacytes.
globate
См. globated.
globated
adj. [L. globus, ball] Globose; spherical.
globoferous cell
(PORIFERA) A cell having a prominent array of paracrystalline components.
globose
См. globular.
globular
adj. [L. globus, ball] Spherical; globe shaped.
globuli cells
(ARTHROPODA: Insecta) Specialized association cells of the brain, small in size with round nuclei rich in chromatin.
globulin
n. [L. dim. of globus, ball] A class of proteins which are insoluble in water, but soluble in saline solutions, or water soluble proteins with globulin-like physical ...
globulus
n.; pl. -li [L. globulus, small ball] (ARTHROPODA: Pauropoda) One jointed globular or two joined pear-shaped sensory organs on the antennae.
glochidium
n.; pl. -dia [Gr. glochis, arrow-point; idion, dim] (MOLLUSCA: Bivalvia) In Unionoida, the modified parasitic larva, with or without hooks, of certain fresh water clams.
glochis
n.; pl. glochines [Gr. glochis, arrow-point] 1. A barbed hair, bristle, spine or point. 2. (MOLLUSCA: Gastropoda) The protrusible radula.
glomerate
adj. [L. glomus, ball] Massed or compacted into a cluster.
glomerule
see glomerulus.
glomerulus
n.; pl. -li [L. dim. glomus, ball] A tuft or cluster of blood vessels or nerve fibers.
glossa
n. [Gr. glossa, tongue] (ARTHROPODA: Insecta) One of a pair of terminal lingular lobes of the labium of certain insects, between the paraglossae; the medium ligula. a. In ...
glossarium
see labrum-epipharynx.
glossate
adj. [Gr. glossa, tongue] Furnished with a tongue-like structure.
glossotheca
n. [Gr. glossa, tongue; theke, case] (ARTHROPODA: Insecta) The pupa integument covering the tongue; a tongue-case.
glottis
n. [Gr. glotta, tongue] The opening from the pharynx into the trachea.
glottoid apparatus
(NEMATA) A toothed projection at the base of the esophastome utilized in rhabditid species and generic identification.
glucoprotein
n. [Gr. gleukos, sweet; proteion, primary] A substance in which hexosamine containing polysaccharide is chemically united with peptides; see glycoprotein, mucoprotein.
glue cell
see adhesive cells.
glumes
n. pl. [L. gluma, husk] (ARTHROPODA: Insecta) In Hymenoptera, longitudinal ridges on the flagellar segments of many wasps.
glutinants
n. pl. [L. gluten, glue] (CNIDARIA) A type of nematocyst; the holotrichous and atrichous isorhizas.
glutinose
См. glutinous.
glutinous
adj. [L. glutinosus, sticky] Having a slimy or sticky surface.
glycocalyx
n. [Gr. glykys, sweet; kalyx, covering] 1. A filamentous layer containing carbohydrate, found on the outer surface of many cells. 2. (ACANTHOCEPHALA) Formerly known as ...
glycogen
n. [Gr. glykys, sweet; genes, born] A branch-chained polysaccharide; a major stored food substance of most animals, fungi and bacteria.
glycogenesis
n. [Gr. glykys, sweet; gennaein, to produce] Formation of glycogen from glucose.
glycogenolysis
n. [Gr. glykys, sweet; genes, born; lyein, to break up] The breakdown of glycogen.
glycolysis
n. [Gr. glykys, sweet; lyein, to break up] The enzymatic breakdown of glucose to lactic acid or pyruvic acid with the release of energy in the form of high energy phosphate ...
glycoprotein
n. [Gr. glykys, sweet; proteion, primary] Glucoprotein whose hexosamine content is less than 4%.
glymma
n.; pl. -ae (ARTHROPODA: Insecta) In ichneumonid Hymenoptera, one of a pair of lateral fovae between the base and spiracles of the petiolar segment; may be small and shallow or ...
gnathal
adj. [Gr. gnathos, jaw] Pertaining to the jaws.
gnathal lobe
1. (ARTHROPODA: Crustacea) The masticatory endite of the mandible; the masticatory process. 2. (ARTHROPODA: Diplopoda) The third or most distal part of the mandible; ...
gnathal pouch
(ARTHROPODA: Insecta) a. The concave surface below the oral plate; the oral chamber. b. In Hymenoptera, used as a receptacle for food particles and detritus in ants.
gnathal region
См. gnathal segments.
gnathal segments
(ARTHROPODA: Insecta) The gnathocephalon.
gnathites
n. pl. [Gr. gnathos, jaw] (ARTHROPODA: Insecta) The mouth parts; the buccal appendages.
gnathobase
n. [Gr. gnathos, jaw; basis, base] 1. (ARTHROPODA) One of a pair of endites used to manipulate or move food in trilobites, and some crustaceans. 2. (ARTHROPODA: ...
gnathocephalon
n. [Gr. gnathos, jaw; kephale, head] (ARTHROPODA: Insecta) That part of the head formed by the gnathal segments and the procephalic lobes.
gnathochilarium
n. [Gr. gnathos, jaw; dim. cheilarion, lip] (ARTHROPODA: Diplopoda) A plate-like mouth structure; thought to be the fused maxillae and labium.
gnathopod(ite)
n. [Gr. gnathos, jaw; pous, foot] (ARTHROPODA: Crustacea) Prehensile appendages. a. The maxilliped. b. In Amphipoda, the first and second pereopods, chelate or ...
gnathos
see subscaphium.
gnathosoma
n. [Gr. gnathos, jaw; soma, body] (ARTHROPODA: Chelicerata) The anterior of two basic regions of the body of a mite or tick bearing the mouth parts; a capitulum ...
gnathostegite
n. [Gr. gnathos, jaw; stegos, roof] (ARTHROPODA: Crustacea) One of a pair of plates covering the mouth parts.
Gnathostomulida
n. [Gr. gnathos, jaw; stoma, mouth] A phylum of microscopic, free-living marine worms that are acoelomate bilateria with a mono-ciliated skin epithelium, jaws and a ...
gnathothorax
n. [Gr. gnathos, jaw; thorax, breast] (ARTHROPODA: Crustacea) Having the first, sometimes also the second, thoracic somites fused with the cephalon; the cephalon and ...
gnotobiote
n. [Gr. gnostos, known; bios, life] A known microorganism living in or on a host.
gnotobiotic
a; see agnotobiotic culture.
gnotobiotic culture
The breeding or culturing of organisms by themselves or in association with other known kinds of organisms; see agnotobiotic culture.
gnotobiotics
n. pl. [Gr. gnostos, known; bios, life] A field of biology involving breeding or culturing of organisms by themselves or together with other known kinds of organisms.
goblet cell
see calyciform cell.
goblets
n. pl. [OF. goblete] (ARTHROPODA: Chelicerata) Stigmatal plate markings of certain hard ticks.
Golgi bodies
[=dictyosomes=golgiosomes or internal reticular apparatus] Organelle found in most eukaryote cells consisting of a stack (dictyosome) of flat sacs (cisternae), involved in ...
golgio-kinesis
Distribution of Golgi bodies during mitosis.
gonad
n. [Gr. gone, that which produces seed] A reproductive organ; a testis, ovary, ovotestis, or their generative tissue.
gonadial
adj..
gonadotrophin
n. [Gr. gone, that which produces seed; tropos, direction] A substance that stimulates the gonads to develop.
gonadotropin
См. gonadotrophin.
gonaduct
see gonoduct.
gonangium
n. [Gr. gone, that which produces seed; angeion, capsule] (CNIDARIA: Hydrozoa) In colonials, the gonotheca and enclosed blastostyle with gonophores.
gonangulum
n. [Gr. gone, that which produces seed; L. angulus, angle] (ARTHROPODA: Insecta) A small sclerite attached to the base of the first gonapophysis articulating with the ...
gonapophysis
n.; pl. -yses [Gr. gone, that which produces seed; apo, from; phyein, to grow] 1. (ARTHROPODA: Crustacea) In male Syncarida, a median process from the base of the first or ...
gonarcus
n. [Gr. gone, that which produces seed; L. arcus, bow] (ARTHROPODA: Insecta) In male Neuroptera, an archshaped structure below the anal segment and above the aedeagus.
gonatocerous condition
(ARTHROPODA: Insecta) In some adult Coleoptera, bearing a geniculate antenna with a long scape and compact club; see orthocerous condition.
gone
n. [Gr. gone, that which produces seed] Any germ cell arising by meiosis.
gongylidia
n. pl.; sing. -ium [Gr. gongylos, ball] Spherical or ellipsoidal swellings at the tips of the hyphae that are cultivated by the Attine ants; a group of gongylidia is sometimes ...
goniatite
n. [Gr. gonia, angle] (MOLLUSCA: Cephalopoda) Extinct Paleozoic ammonoid cephalopod existing in the Middle Devonian Period.
gonic
; syngonic.
gonoblast
n. [Gr. gone, that which produces seed; blastos, bud] A reproductive cell or bud.
gonocalyx
n. [Gr. gone, that which produces seed; kalyx, cover] (CNIDARIA) The bell of a medusa-like gonophore.
gonochorism
n. [Gr. gone, that which produces seed; chorismos, separation] The possession of functional gonads of one sex only (male or female); dioecious. gonochoristic adj..
gonochoristic
adj. [Gr. gone, that which produces seed; chorismos, separation] Unisexual; producing distinct males and females; see hermaphrodite.
gonocoel
n. [Gr. gone, that which produces seed; koilos, hollow] The cavity containing the gonads.
gonocoxa
См. gonocoxite.
gonocoxite
n.; pl. -ae [Gr. gone, that which produces seed; L. coxa, hip] (ARTHROPODA: Insecta) The coxite of the gonopod; see second valvifers.
gonocoxopodites
n. pl. [Gr. gone, that which produces seed; L. coxa, hip; pous, foot] (ARTHROPODA: Insecta) In Siphonaptera, a pair of 2-segmented claspers associated with the 9th tergum ...
gonodendron
n. [Gr. gone, that which produces seed; dendron, tree] (CNIDARIA: Hydrozoa) In Siphonophora, a branching structure bearing grapelike clusters of gonophores that are not ...
gonoducts
n. pl. [Gr. gone, that which produces seed; L. ductus, led] 1. The ducts through which the gametes reach the exterior, oviduct in females, vas deferens in males. 2. ...
gonogensis
see gametogenesis.
gonomery
n. [Gr. gone, that which produces seed; meros, part] (ARTHROPODA: Insecta) The separate grouping of maternal and paternal chromosomes during cleavage in some embryos.
gonopalpon
n. [Gr. gone, that which produces seed; L. palpare, to touch] (CNIDARIA: Hydrozoa) In Siphonophora, tentacle- like dactylozooids associated with gonophores.
gonopericardial canal
(MOLLUSCA: Solengastres) A canal from gonads to the pericardium.
gonophore
n. [Gr. gone, that which produces seed; phoreus, bearer] (CNIDARIA: Hydrozoa) In Hydroida, a structure that produces gametes and is a sporosac, medusa or any intermediate ...
gonoplac
n. [Gr. gone; that which produces seed; plax, plate] (ARTHROPODA: Insecta) A process of the second gonocoxa; may be a separate sclerite and may form a sheath around the ...
gonopod
n. [Gr. gone, that which produces seed; pous, foot] (ARTHROPODA) The appendages serving as genital segments, or associated segments modified for reproductive purposes, ...
gonopody
n. [Gr. gone, that which produces seed; pous, foot] A type of internal fertilization whereby the male sperm is transferred by an appendage to the female genital organs; ...
gonopore
n. [Gr. gone, that which produces seed; poros, channel] 1. The external opening of the reproductive organs. 2. (ARTHROPODA: Crustacea) The sexual pore. 3. (NEMATA) The ...
gonosome
n. [Gr. gone, that which produces seed; soma, body] (CNIDARIA: Hydrozoa) All gonophores of a colony collectively; see trophosome.
gonosomite
see genital segment.
gonostyle
n. [Gr. gone, that which produces seed; stylos, pillar] (CNIDARIA: Hydrozoa) The blastostyle; gonodendron.
gonostylus
n.; pl. gonostylii [Gr. gone, that which produces seed; stylos, pillar] (ARTHROPODA: Insecta) The stylus of a genital segment; harpago; style; stylus; paramere.
gonotheca
n. [Gr. gone, that which produces seed; theke, case] (CNIDARIA: Hydrozoa) In Leptomedusae, a vase-like covering of the stalklike blastostyles.
gonotreme
n. [Gr. gone, that which produces seed; trema, hole] (ARTHROPODA: Insecta) The female gonopore, oviporus (secondary gonopore), or vulva; in males, the gonopore.
gonotrophic concordancy
(ARTHROPODA: Insecta) In certain mosquitoes, discontinuation, or only occasional ingesting of blood meals after ovulation has stopped; see gonotrophic dissociation.
gonotrophic dissociation
(ARTHROPODA: Insecta) In certain mosquitoes, the continuation of ingesting blood meals after ovulation has stopped; see gonotrophic concordancy.
gonotyl
n. [Gr. gone, that which produces seed; tylos, knob] (PLATYHELMINTHES: Trematoda) In digenetic forms, a sucker or other perigenital specialization associated with the ...
gonozooecium
n. [Gr. gone, that which produces seed; zoon, animals; oikos, house] (BRYOZOA: Stenolaemata) An enlarged polymorph that serves as a brood chamber for eggs.
gonozooid
См. gynozooid.
gorgeret
n. [Gr. Gorgos, terrible] 1. A barblike structure. 2. (ARTHROPODA: Insecta) The sting of a honey bee. 3. (NEMATA) The barb on the spicule.
gorgonin
n. [Gr. Gorgos, terrible] (CNIDARIA: Anthozoa) A proteinaceous horny material forming the axial skeleton of sea fans and sea whips.
Gotte's larva
(PLATYHELMINTHES: Turbellaria) In Stylochus, a "Muller\'s"- type larva with the exception of four instead of eight lobes.
Graber's organ
(ARTHROPODA: Insecta) In tabanid larvae, a pyriform sac containing a series of capsules that opens at the surface between the last two segments, thought to be sensory in ...
gracile
adj. [L. gracilis, slender] Gracefully slender or thin.
gradate
adj. [L. gradus, step] Regularly increasing in size; arranged in a series; blending of colors.
grade
n. [L. gradus, step] A group of organisms similar in level of organization.

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