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Слова на букву prop-root (732)

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pterygostomial spine
(ARTHROPODA: Crustacea) In Decapoda, a spine on the anterolateral angle.
См. pterygotes.
n.; n. pl. [Gr. pterygotos, winged] (ARTHROPODA: Insecta) A subclass containing the winged and secondarily apterous insects, with varied metamorphosis, and have no ...
ptilinal suture
(ARTHROPODA: Insecta) In Diptera, a crescentshaped groove, situated on the lower part of the frons between the bases of the antennae and the eyes, which usually extends ...
n.; pl. ptilina [Gr. ptilon, feather] 1. (ARTHROPODA: Insecta) In Diptera, a temporary bladderlike structure of a pupa that can be inflated and thrust out through the ...
n. [Gr. ptilon, feather] (ARTHROPODA: Insecta) Winged insects.
n. [Gr. ptyche, fold] (ARTHROPODA: Chelicerata) In Oribatida, an articulation between the prosoma and opisthosoma, allowing the legs to be concealed by down folding of the ...
adj. [Gr. ptyche, fold; lophos, crest] (BRACHIOPODA) A lophophore with brachia folded into one or more lobes in addition to a median indentation; ptycholophus n.
n. [L. pubescere, to grow hairy] A covering of fine soft hairs; pubescent adj..
adj. [L. pubes, adult] Referring to the area of the genitalia.
pubic process
(ARTHROPODA: Insecta) In Scarabaeoidea, fused pubic plates above the second valvifers (fused second valvulae).
n. [L. pulex, flea] Dark brown or purplish brown.
n. [L. pudenda, external genitals] External female genitalia; the vulva.
n. [L. puerilis, childish] (ARTHROPODA: Crustacea) 1. Preadult stage of Decapoda Scyllaridae; nisto, pseudibacus. 2. Preadult stage of Decapoda Palinuroidea.
n. [ME. puf] (ARTHROPODA: Insecta) In Diptera, a process in which the bands (chromomeres) of the chromosomes of the salivary glands undergo puffing which is usually correlated ...
n.; pl. -ria (ARTHROPODA: Insecta) A type of abdomen with membranous connections between the sclerites of the terga and pleura of the abdominal rings.
adj. [L. pulmo, lung] Pertaining to the lungs.
pulmonary cavity
См. pulomonary sac.
pulomonary sac
(MOLLUSCA: Gastropoda) In Pulmonata, a pallial cavity formed by transverse vascularizations of the interior dorsal wall.
pulsatile vesicles
(ANNELIDA: Hirudinoidea) Eleven small hemispherical pulsing structures filled with coelomic fluid.
pulsating vesicle
(ROTIFERA) Small bladder-like excretory organ into which the flame bulb system empties.
adj. [L. pulvereus, full of dust] Powdery; dusty; farinaceous.
adj. [L. pulvillus, little cushion] (ARTHROPODA: Insecta) Appearing lobelike or padlike; shaped like a pulvillus.
n.; pl. -li [L. pulvillus, little cushion] (ARTHROPODA: Insecta) In Diptera, the pad of the membranous lobe beneath the tarsal claw, arising from the base of each ...
adj. [L. pulvinus, cushion] 1. Moderately convex or swelled. 2. Cushion-like.
see arolium.
pumping pharyngeal tube
see food meatus.
n. pl.; sing. puncta [L. punctum, small hole or spot] Small pores, holes, or dots on a surface.
adj. [L. punctum, small hole or spot] Covered with small pores, holes, or dots.
adj. [L. punctum, small hole or spot] Dotted with minute impressions.
n. [L. punctum, small hole or spot] A small pit or spot on a surface.
n. [L. punctura, hole] A small hole; a minute puncture- like depression.
n.; pl. pupae [L. pupa, puppet] (ARTHROPODA: Insecta) The usually quiescent stage between the larva and adult in complete metamorphosis.
pupa adectica
(ARTHROPODA: Insecta) A pupa without articulated mandibles for use by a pharate adult; see pupa dectica, pupa exarate, pupa obtect.
pupa adheraena
(ARTHROPODA: Insecta) A pupa which hangs head down in a perpendicular manner.
pupa angularis
(ARTHROPODA: Insecta) A pupa bearing a pyramidal process or nose on its dorsal surface.
pupa coarctate
(ARTHROPODA: Insecta) Puparium or last larval skin enclosing the exarate pupa; found in many Diptera.
pupa conica
(ARTHROPODA: Insecta) A conical, nongular pupa.
pupa custodiata
(ARTHROPODA: Insecta) A pupa in a partially open cocoon.
pupa dectica
(ARTHROPODA: Insecta) A pupa with articulated mandibles that can be used by the pharate adult; see pupa adectica.
pupa dermata
(ARTHROPODA: Insecta) A pupa retaining the larval skin without indication of future limb placement.
pupa exarate
(ARTHROPODA: Insecta) An adecticous pupa in which the appendages are free and not cemented to the body wall; pupa exarata; see pupa obtect.
pupa folliculata
(ARTHROPODA: Insecta) A pupa enclosed in a theca or cocoon.
pupa incompletae
(ARTHROPODA: Insecta) A Lepidoptera pupa with more than three movable abdominal segments.
pupa larvata
(ARTHROPODA: Insecta) A pupa in which the forming adult appendages are apparent on the surface of the theca or cocoon; a masked pupa.
pupa libera
(ARTHROPODA: Insecta) A Lepidoptera pupa with many free segments.
pupa nuda
(ARTHROPODA: Insecta) An insect pupa free from attachment.
pupa obtect
(ARTHROPODA: Insecta) An adecticous pupa in which the appendages are more or less strongly cemented to the body, assumed by tanning of protein in the molting fluid; pupa ...
pupa subterranean
(ARTHROPODA: Insecta) A pupa submerged into the soil during transformation; pupa subterranea.
pupa-chromogenic phase
(ARTHROPODA: Insecta) The last pupal phase before the adult, in which pigmentation occurs.
pupa-chromoptic phase
(ARTHROPODA: Insecta) The pupal phase (after telemorphic) when pigmentation of the compound eyes begin.
pupal respiratory horn
see respiratory horn.
pupal-adult apolysis
(ARTHROPODA: Insecta) In Diptera, the interim between phanerocephalic pupa and pharate adult.
n. [L. pupa, puppet] (ARTHROPODA: Insecta) In certain families of Diptera, formation of a puparium by a third stage, nonfeeding larva; a post-feeding larva.
n. [L. pupa, puppet] (ARTHROPODA: Insecta) 1. In certain families of Diptera, a case formed by the hardening of the next to the last larval skin, in which the pupa is ...
v. [L. pupa, puppet] The transformation to a pupa.
adj. [L. pupa, puppet; fero, bear] (ARTHROPODA: Insecta) In Hemiptera, the generation of aphids that produce sexed individuals.
adj. [L. pupa, puppet; forma, shape] Cylindrical, with rounded ends; cocoon-shaped; a pupiform shell.
see pupa coarctate.
n. [L. pupilla, pupil of eye] (ARTHROPODA: Insecta) The central spot of an ocellus.
n. [L. dim. pupa, puppet] (ARTHROPODA: Insecta) In Diaspididae, the adult female shrinks inside the exuviae of the second larval stage and lives and lays eggs inside; ...
adj. [L. pupilla, pupil of eye] Having an eye-like center; a spot or mark.
n. [L. pupa, puppet; parere, to beget] (ARTHROPODA: Insecta) In Diptera, a convenience group in which wings are reduced, direct reproduction of puparia, with development ...
adj. [L. pupa, puppet; parere, to beget] (ARTHROPODA: Insecta) Bearing larva that are full grown and ready to pupate.
adj. [L. pupa, puppet; Gr. eidos, form] 1. Pupiform. 2. (ARTHROPODA: Diplopoda) The final embryo at hatching, without legs or segmentation visible.
pure line population
Descendants through self-fertilization of a single homozygous parent or highly inbred line of animals obtained by long continued inbreeding.
purine bases
Nitrogen-containing organic cyclic bases that pair with pyrimidine bases in DNA and RNA replication.
adj. [L. purpura, purple] Being purple in color.
См. pustule.
n.; pl. -lae [L. pustula, blister] 1. An elevation resembling a pimple, blister or wartlike projection; smaller than a tubercle. 2. (BRYOZOA) A small regular skeletal ...
adj. [L. putare, to think] Commonly regarded as such; reputed to be; supposed.
n. [Gr. pyknos, dense] Degeneration of a cell nucleus characterized by condensation and an increased affinity for stain; pycnotic adj..
adj. [Gr. pyge, rump] Situated back, or pertaining to the posterior end of the back; pygidial adj..
pygidial fringe
(ARTHROPODA: Insecta) In homopteran Coccoidea, the projecting ends of the lateral margin of the pygidium; the lateris.
pygidial glands
(ARTHROPODA: Insecta) 1. In Coleoptera, paired organs opening beneath the last abdominal tergite that function to secrete a corrosive, pungent defense fluid, or a substance ...
pygidial incision
see anal cleft pygidial plate (ARTHROPODA: Insecta) In Hymenoptera, a flat plate surrounded by a carina or line, sometimes an apical projection on the 6th gastral tergite ...
pygidial setae
see anal setae.
n.; pl. -dia [Gr. pygidion, narrow rump] 1. (ANNELIDA) The telotroch and anal region behind it, bearing cirri. 2. (ARTHROPODA: Insecta) The last dorsal segment of the ...
n. [Gr. pyge, rump; L. fero, carry] (ARTHROPODA: Insecta) In Homoptera, the last abdomenal segment bearing lateral margins.
n. [Gr. pyge, rump; meros, part] (ANNELIDA: Oligochaeta) The terminal part of the body; sometimes called anal segment, although some of the characters of a metamere are ...
n. [Gr. pyge, rump; phoreus, bearer] (ARTHROPODA: Insecta) 1. The pygofer. 2. In male Heteroptera, the 9th abdominal segment. 3. In male Homoptera, the posterolateral ...
pygopid loop
(BRACHIOPODA) A short ringlike loop with slightly arched cross band.
n. [Gr. pyge, rump; pous, foot] (ARTHROPODA: Insecta) The paired appendages of the 10th abdominal segment.
n. [Gr. pyge, rump; stylos, pillar] (ARTHROPODA: Insecta) In Hymenoptera, small lateral setigerous processes on the 9th gastral tergite.
n. [Gr. pyle, gate; pous, foot] (ARTHROPODA: Crustacea) In gnathiidean Isopoda, the second thoracopod; fused to the head resulting in the appendages being second maxillipedes ...
pyloric valve
1. (ARTHROPODA: Insecta) A regulatory (sphincter) at the entrance to the intestine from the stomach; usually located behind the stomach in the anterior part of the ...
n. [Gr. pyloros, gatekeeper] 1. (ARTHROPODA: Insecta) A short distinct section of the proctodeum intervening between the ventriculus and true intestinal tube, containing ...
pyraform glands
(ACANTHOCEPHALA) Glands in the tail of some males; function unknown.
pyraform organ
see esophageal bulb.
n. [Gr. pyramis, pyramid] 1. Any conical or triangular structure. 2. (ECHINODERMATA: Echinoidea) The five large calcareous scraping plates that compose the Aristotle\'s ...
pyramid of biomass
Weight relationships between the trophic levels in a food chain.
pyramid of energy
Energy relationships between the trophic levels in a food chain.
pyramid of numbers
Numbers of individuals at the different trophic levels in a food chain.
adj. [L. pyrum, a pear; forma, shape] Having the shape of a pear; round and large at one end, generally tapering to the other.
pyriform vesicle
see Muller\'s organ.
Q technique
The analysis of association of pairs of taxa in a data matrix.
adj. [D. kwakken] (ARTHROPODA: Insecta) In Hymenoptera, sound made by new queens in the cells in response to " piping".
n. [L. quadrus, fourfold; angulus, angle] 1. Any figure having 4 angles. 2. (ARTHROPODA: Insecta) In odonatan Zygoptera, a cell beyond the arculus; quadrangular adj..
n. [L. quadratus, squared] A sample area of land for biotic study, usually 1 square meter.
adj. [L. quadratus, squared] Having 4 sides in outline.
quadrate plates
(ARTHROPODA: Insecta) In Hymenoptera, the reduced 9th abdominal tergite.
adj. [L. quadrus, fourfold; capsula, little box] Having 4 capsules.
see columella.
adj. [L. quadrus, fourfold; dentatus, tooth] Having 4 teeth or tooth-like processes.
adj. [L. quadrus, fourfold] Four rows; in 4 segment.
adj. [L. quadrus, fourfold; latus, side] 1. Formed or bounded by 4 sides; 4 lines. 2. (ARTHROPODA: Insecta) In zygopterous Odonata, the discal wing cell.
adj. [L. quadrus, fourfold; macula, spot] Having 4 spots.
adj. [L. quadrus, fourfold; partitus, divided] In 4 parts.
adj. [L. quadrus, fourfold; penna, feather] Having 4 feather-like branches or clefts.
adj. [L. quadrus, fourfold; Gr. prostates, one who stands first] (ANNELIDA) Having 4 prostates.
adj. [L. quadrus, fourfold; radius, ray] (PORIFERA) Having 4 rays; tetraxon, tetractine.
adj. [L. quadrus, fourfold; Gr. theke, case] (ANNELIDA) Having 4 spermathecae.
adj. [L. quadrus, fourfold; valva, fold] 4-valved.
see tetrad.
adj. [L. quasi, as if; socius, companion] (ARTHROPODA: Insecta) In Hymenoptera, females of the same generation forming a colony and cooperating in brood care.
n. [A.S. cwen, wife] (ARTHROPODA: Insecta) 1. A female member of the reproductive caste in semisocial and eusocial insects; may or may not differ morphologically from the ...
queen control
(ARTHROPODA: Insecta) In social Hymenoptera, inhibitory influence of the queen on the reproductive activities of workers and other queens.
queen substance
(ARTHROPODA: Insecta) In Hymenoptera, pheromones released by the queen honeybee that attracts and controls the reproductive activities of workers and other queens; ...
Quenstedt muscles
(MOLLUSCA: Bivalvia) Paired, small muscles anterior to the ctenidial elevator muscles of oysters.
quick muscle
see phasic muscle.
n. [L. quiescere, to become quiet] A condition of temporary cessation of development, or other activity, during which the animal requires little nourishment, but shows ...
adj. [L. quiescere, to become quiet] 1. To become quiet. 2. (ARTHROPODA: Insecta) Applied to biological inactivity or prepupae and pupae with complete metamorphosis.
n.; pl. -xes [L. quincunx, arranged in diagonal rows, five-twelfths] 1. An arrangement of five things in a square, having one in each corner and one in the center. 2. ...
quinone biochrome
(ARTHROPODA: Insecta) Quinone pigments: anthraquinones formed from the condensation of three benzene rings, and aphins, with a nucleus of seven condensed benzene rings; see ...
n. pl. [Ab.Am. quinine, bark of barks] 1. Various compounds formed from benzene and functioning in biological oxidation-reduction systems. 2. A hydrogen acceptor utilized in ...
adj. [L. quinque, five; dens, tooth] Having 5 teeth.
adj. [L. quinque, five; farius, fold] Arranged in five rows, ranks, or columns.
adj. [L. quinque, five; loculus, cell] Consisting of 5 cells, or 5 loculi.
R technique
An analysis of association of characters in a data matrix.
Species of organisms that use a survival reproductive \'strategy\' characterized by high fecundity, rapid development, early reproduction, small body size, and semelparity; ...
n. [F. race; member of the same stock or lineage] A population or aggregate of populations inhabiting a defined geographical and/or ecological region possessing ...
adj. [L. racemus, bunch] Bunch, as perhaps of grapes.
racemose glands
(SIPUNCULA) Glandular structures on each side of the rectum; function unknown; buschelformigen Korper.
См. rhacidian.
adj. [Gr. rhachis, backbone; L. forma, shape] Shaped like a rachis.
adj. [Gr. rhachis, backbone; glossa, tongue] (Moll) A radula with three longitudinal rows of teeth: one median (may be simple or have several cusps) and two lateral ...
n.; pl. rachides, rachises [Gr. rhachis, backbone] 1. Any of various axial structures. 2. (NEMATA) The central or axial chord in the ovary around which multiple rows of ...
adj. [L. radial, ray] 1. Extending from a center toward the periphery like rays. 2. Pertaining to a radius. n. [L. radial, ray] (ECHINODERMATA) 1. In Crinoidea, any ...
radial apophysis
(ARTHROPODA: Chelicerata) In Arachnida, a copulatory organ on the male palp.
radial canal
(CNIDARIA: Scyphozoa) A canal in the mesoglea of a medusa running from the center to the edge, or at least in part.
radial cell
(ARTHROPODA: Insecta) A cell bordered anteriorly by a branch of the radial vein.
radial gashes
(MOLLUSCA: Bivalvia) Radial, sharp-edged cuts found on the upper valve of Gryphaeidae.
radial growth
(MOLLUSCA: Bivalvia) Growth direction outward from the beak to the shell edge; marked by the costa or other ornamentation.
radial lirae
see carapace costae.
radial masses
(NEMATODA: Adenophorea) In Enoplida, structures connecting the mandibular ring to the radial processes.
radial muscles
(NEMATA) The radial musculature of the nematode esophagus.
radial plates
(ECHINODERMATA: Crinoidea) Tegmental armature in the form of calyx plates in primative stalked crinoids, oral to the basal plates.
radial processes
(NEMATODA: Adenophorea) In Enoplida, supporting structures of the onchial plate.
radial ribs
(MOLLUSCA: Bivalvia) Ribs or bands of color meeting in a point at the umbones and diverging toward the ventral margin.
radial sector
(ARTHROPODA: Insecta) The posterior wing branch of the two main branches of the radius.
radial skeleton
(PORIFERA) Structural elements diverging from a central point toward the surface.
radial symmmetry
Having similar parts arranged around a common central axis; see bilateral symmetry.
radial vein
(ARTHROPODA: Insecta) Often the heaviest vein of a wing, that forks near the middle of the wing, with the main part forming the radial sector vein.
radial-medial cross vein
(ARTHROPODA: Insecta) A wing cross vein between the lower first fork of the radial sector and the upper first fork of the medial vein.
radianal plate
(ECHINODERMATA: Crinoidea) The calyx plate in the anal interradius in association with the anal tube.
v. [L. radius, ray] To send out rays or direct lines from a common point. adj. [L. radius, ray] Radially symmetrical; radiating.
radiate veins
(ARTHROPODA: Insecta) The anal veins.
v. [L. radicatus, rooted] (MOLLUSCA: Bivalvia) Becoming permanently established by a root-like organ used for attachment.
see radicolous.
n. [L. radix, root] (ARTHROPODA: Insecta) The base of the scape of the antenna; radicular adj..
n.; pl. radicolae [L. radix, root; cola, dweller] (ARTHROPODA: Insecta) In Homoptera, the root-infesting phylloxerans; radicicola.
adj. [L. radix, root; cola, dweller] Inhabiting roots; radicicolus.
see rays.
n. [L. radius, ray; Gr. bios, life; logos, discourse] The study of the effects of radioactivity on living organisms.
n. [L. radius, ray; carbo, coal] A radioactive isotope of carbon found naturally in the air and in organisms that is used to date fossil and subfossil remains; also used in ...
n. [L. radius, ray; Gr. oikos, house; logos, discourse] Radiation ecology; study of effect and trophic pathways of radioisotopes in communities.
n. pl. [L. radius, ray; Gr. isos, equal; topos, place] Unstable forms of elements that show radioactivity.
n. [L. dim. radius, ray] 1. (ANNELIDA: Polychaeta) Featherlike head structures forming a crown, or modified into a long stalked knob (operculum); functioning in filtering ...
adj. [L. radius, ray; Gr. mimos, mime] Chemical agents causing effects similar to ionizing radiation in living systems.
adj. [L. radius, ray; re-, back; stare, to stand] Organisms or tissues resistant to damage by radiation.
adj. [L. radius, ray; sentire, to feel] Sensitive to radiation effects.
n.; pl. radii [L. radius, ray] 1. In radially symmetrical animals, the primary axis of symmetry. 2. (ECHINODERMATA: Crinoidea) One of 5 reference planes passing through ...
n. [L. radix, root] 1. A primary source. 2. (ARTHROPODA: Chelicerata) In Arachnida, apophysis of male copulatory organ. 3. (ECHINODERMATA: Crinoidea) The rootlike ...
n.; pl. radulae [L. radula, scrape] 1. (ARTHROPODA: Insecta) The raster. 2. (MOLLUSCA) A uniquely molluscan feeding rasplike organ, odontophore or lingual ribbon, armed ...
radula sac
(MOLLUSCA) An evaginated pocket in the posterior wall of the buccal cavity containing on it\'s floor the radula; see raster.
n. [L. radula, scrape; fero, to bear] (BRACHIOPODA) A hook-shaped or rodlike crura on the ventral side of the hinge plate, projecting toward the pedicle valve.
see egg-rafts.
see rastellum.
См. rameal.
adj. [L. ramus, branch] Branched.
ramate mastax
(ROTIFERA: Bdelloidea) A stout mastax, with reduced fulcrum and manubria.
adj. [L. ramus, branch] Branching or branch-like.
adj. [L. dim. ramus, branch] Having small branches.
n. [L. dim. ramus, branch] (ARTHROPODA: Insecta) In Ichneumonoidea, the distal stump of the medial vein of the fore wings.
n. [L. ramus, branch] An individual clone member.
pl. of ramus.
rami valvularum
see ramus.
adj. [L. ramus, branch; cornu, horn] (ARTHROPODA: Insecta) Having a branched antennae.
adj. [L. ramus, branch; dim. costa, rib] (BRACHIOPODA) Having a costellae on the shell resultant from branching.
n. [L. ramus, branch; ficare, to make] Branching out in all directions; offshoot.
adj. [L. ramus, branch; forma, shape] Resembling or shaped like branches.
v.; -fied; -fying [L. ramus, branch; ficere, to make] To send forth outgrowth or branches.
adj. [L. ramosus, branching] 1. Branching, having lateral divisions full of branches; branch-like; ramified. 2. (ARTHROPODA: Insecta) In immatures, setae with branches, ...
n. [OF. ramper, to climb] (MOLLUSCA: Gastropoda) Abapically inclined flattened band on the shell surface, limited abaxially by a ridge or angulation.
n.; pl. rami [L. ramus, branch] 1. A branch or outgrowth of a structure. 2. (ANNELIDA) The notopodium and neuropodium that form the two parts of a parapodium; the two ...
random fixation
The complete loss of one allele, with fixation of the other, in a population owing to accidents of sampling.
v. [OF. ranc, row] The appropriate placement of a taxon in the hierarchy of categories.
adj. [L. rapaxacis, grasping] Subsisting on prey; predacious; voracious; predatory.
see rhaphe.
n. [Gr. rhaphidos, needle] (PORIFERA: Desmospongia) A thin diactinal microsclere lacking ornamentation.
adj. [L. raptor, robber] Fitted for grasping prey.
raptorial claw
1. (ARTHROPODA: Crustacea) The toothed dactyl curved backward on the propodus. 2. (ARTHROPODA: Insecta) In Mantids, the spinose tibiae and femur that produce the hook. ...
adj. [L. rasor, scraper] Adapted for scratching.
n. [OF. rasper, to scrape] 1. (ARTHROPODA: Crustacea) One or more rows of chitinous plates or scales on the pereopodal or uropodal surface segments. 2. (ARTHROPODA: ...
n. [Ger. Rasse, race; Kreis, circle] Polytypic species; rheogameon; see circular overlap.
n. [L. dim. rastrum, rake] (ARTHROPODA: Chelicerata) In Arachnida, a structure on the chelicera bearing numerous tooth-like projections, stout and rigid spines, or seta; the ...
n. [L. dim. rastrum, rake] (ARTHROPODA: Chelicerata) In Arachnida, the teethlike projections on the chelicera borne by the rastellum or paturon.
n.; pl. rastri [L. rastrum, rake] (ARTHROPODA: Insecta) A complex of bare areas, hairs and spines on the ventral surface of the last abdominal segment, in front of the anus ...
adj. [L. rastrum, rake] Having longitudinal scratches over the surface.
rat-king cercariae
См. rattenkonig.
rat-tailed larva
См. rat-tailed maggots.
rat-tailed maggots
(ARTHROPODA: Insecta) In Diptera, Syrphidae larva having a long flexible respiratory tube extending from the end of the body.
rataria larva
(CNIDARIA: Hydrozoa) In some Siphonophora, freeswimming larva, hourglass in shape, with an anterior disc collar; develops from the conarium larva.
adj. [L. ratis, raft] Lacking a keel; a smooth ventral somite; lacking ridges or raised lines; see carinate.
(PLATYHELMINTHES: Trematoda) Marine cercariae that occur in masses, with the tail tips attached to a protoplasmic mass.
n. [L. radius, ray] 1. One of a number of fine lines radiating from a center. 2. Each arm of the triradiate lumen of nematodes and other pseudocoelomates. 3. A division ...
n. [L. re, again; afferre, to bring] Sensory impulses caused by an animal\'s movements relative to the environment; see afference.
adj. [F. rebord, rim] (ARTHROPODA: Chelicerata) In Acarina, pertaining to the distal thickened and strengthened end of the labium.
recapitulation theory
The theory that ontogeny recapitulates phylogeny.
n. [L. recens, new] Taxa still in existence.
n. [L. recipere, to receive] Any organ that receives and stores; acting as a repository.
n. [L. recipere, to receive] A receptacle.
receptaculum seminalis
См. receptaculum seminis.
receptaculum seminis
see seminal receptacle.
n. [L. recipere, to receive] A structure specialized for receiving a particular kind of stimulus.
recessive allele
1. The failure of an allele to affect the phenotype of the heterozygote. 2. A term applied to organisms displaying recessive characters; see double recessive, dominant ...
recessive character
A character of one parent that manifests itself in the offspring only if it is homozygous in the offspring.
reciprocal feeding
adj. [L. re, back; clinare, to lean] Inclined backward.
adj. [L. re, back; clivus, slope] 1. Having the form of a sigmoid curve; a convex and concave line. 2. (ARTHROPODA: Insecta) An insect wing vein having the front end ...
См. reclivate.
adj. [L. re, back; combinere, to join] Organisms or cells arising by genetic recombination.
recombinant DNA
DNA produced by recombination, particularly DNA produced from 2 different species by techniques of genetic engineering.
adj. [L. reconditus, put away, hidden] Concealed; remote from ordinary or easy perception; hidden.
n. [L. recrudescere, to become raw again] A new outbreak after a period of abatement or inactivity; recrudescent adj..
recruitment trail
(ARTHROPODA: Insecta) In social Hymenoptera, an odor trail laid by a single scout worker to recruit nestmates to an area where many workers are needed.
adj. [L. rectus, straight] Of or pertaining to the rectum.
rectal caecum
(SIPUNCULA) A small blind tube present on the posterior or rectal section of the gut; function unknown.
rectal gills
(ARTHROPODA: Insecta) In anisopteran Odonata nymphs, an elaborate system of folds in the wall of the rectum, the latter chamber forming the branchial basket.
rectal glands
A term loosely applied to numerous glands adjacent to or associated with the anus; glands which often secrete either a lubricant, silk-gum, or other specialized material such ...
rectal matrix glands
see matrix glands.
rectal muscles
(NEMATA) Specialized muscles that function to open and close the anal opening.
rectal pad
(ARTHROPODA: Insecta) Columnar epithelium (usually 6) extending longitudinally along the rectum, important in the reabsorption of water, salts and amino acids from the ...
rectal papillae
(ARTHROPODA: Insecta) In some Diptera, a papilliform modification of the rectal pads projecting into the rectum enclosing intercellular sinuses separated from the gut ...
rectal pouch
1. (ARTHROPODA: Insecta) a. In some Coleoptera, an enlarged anterior part of the rectum opening into the hindgut; function unknown. b. In Isoptera, an enlargement of the ...
rectal tracheal gills
(ARTHROPODA: Insecta) In some nymphs of Odonata, lamellate structures in the rectum supplied with tracheae and tracheoles.
rectal valve
(ARTHROPODA: Insecta) A circular or lobate fold of the hind intestine separating the distal intestine and rectum.
adj. [L. rectus, straight] Straight.
n. [L. rectus, straight; facare, to make] A property of some cell membranes that allow impulses to pass more easily in one direction that in the opposite direction, resulting ...
adj. [L. rectus, straight; gradus, step] 1. Walking in a straight line. 2. (ARTHROPODA: Insecta) Pertaining to larvae with 16 legs that progress with a straight body, as ...
adj. [L. rectus, straight; linea, line] Straight; formed in or bound by straight lines.
adj. [L. rectus, straight; margo, edge] (BRACHIOPODA) Having a straight anterior commissure.
n. [L. rectus, straight] The posterior ectodermal portion of the enteron ending at the anus, in some groups this includes the entire proctodeum; rectal a; see proctodeum, ...
adj. [L. recumbere, to lie down] Reclining.
recumbent spines
(BRACHIOPODA) Curved spines laying at an angle of less than 45° to the surface of the shell.
n. [L. recurrere, run again] Returning; reappearing at intervals; recurrent species.
recurrent collateral
A collateral axon that turns back to end near the cell body or a similar one.
recurrent nerve
(ARTHROPODA: Insecta) A nerve extending posteriorly from the frontal ganglion along the mid-dorsal line of the esophagus, passing under the brain and then expanding into a ...
recurrent vein
(ARTHROPODA: Insecta) 1. In Hymenoptera, one of two transverse veins immediately posterior to the cubital vein. 2. In Neuroptera, A vein at the base of the wing between ...
adj. [L. re, back; curvus, bent] 1. Bent upward or backward; curved or bent back or down. 2. (ARTHROPODA: Chelicerata) In Arachnida, lateral eyes farther back than the ...
recurved ovary
see reflexed ovary.
n.; pl. rediae [NL. after Francesco Redi, naturalist] (PLATYHELMINTHES: Trematoda) In Digenea, a larval produced by asexual reproduction within a sporocyst or mother ...

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