Слова на букву terg-x-ch (737) Dictionary of invertebrate zoology
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Слова на букву terg-x-ch (737)

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tropotaxis
n. [Gr. tropos, turn; taxis, arrangement] A type of taxis in which an animal directs itself in relation to a source of stimulation by comparing the amount of stimulation on ...
trumpet
n. [OF. trompe, trumpet] (ARTHROPODA: Insecta) In Diptera, paired, usually movable respiratory structures, located on the dorsal portion of the cephalothorax of culicid ...
truncate
adj. [L. truncus, cut off] Terminating abruptly; ending squarely with a cut-off edge; truncation n.
trunk
n. [L. truncus, cut off] 1. (ANNELIDA) a. In Polychaeta, the body between the peristomium and the pygidium. b. In Oligochaeta, the body between the peristomium and ...
trypsin
n. [Gr. tryein, to rub down; pepsis, digestion] An enzyme that catalyzes the hydrolysis of proteins; tryptic adj..
tryptophan
См. tryptophane.
tryptophane
n. [Gr. tryein, to rub down; phanein, to appear] An amino acid existing in proteins, from which it is set free by tryptic digestion, that gives a red or violet color on ...
tube
n. [L. tubus, tube] Any hollow, cylindrical structure.
tube tracheae
(ARTHROPODA: Chelicerata) In Opiliones, Solifugae and most spiders, tube-like tracheae; usually unbranched ectodermal invaginations; see sieve tracheae.
tube-feet
(ECHINODERMATA) Small, fluid-filled tubes of the water vascular system functioning in locomotion, adhesion, food capture and transport to the mouth; some are sensory and ...
tubercle
n. [L. dim. tuber, hump] 1. A small knoblike or rounded protuberance; see torus. 2. (ARTHROPODA: Insecta) In Diptera, sometimes used for an elongate facial swelling.
tubercula pubertatis
(ANNELIDA: Oligochaeta) A glandular swelling near the ventrolateral margin of the clitellum of mature adult earthworms during copulatory phase; differs in size, shape and ...
tuberculate
, tuberculose adj..
tuberiferous
adj. [L. dim. tuber, hump; fero, bear] Bearing tubercles.
tubicolous
adj. [L. tubus, tube; colere, to dwell] Inhabiting a tube; a tubular spider web.
tubifacient
adj. [L. tubus, tube; facere, to make] Tube constructing.
tubule
n. [L. dim. tubus, tube] A minute tube.
tubulus
n. [L. dim. tubus, tube] (ARTHROPODA: Insecta) In Lepidoptera, a tubular, telescoping ovipositor.
tubus
n. [L. tubus, tube] (NEMATA) A cuticular projection surrounding the spicules beyond the body outline; cloacal tubus.
tuft sensilla
(ARTHROPODA: Crustacea) In Decapoda, small branched hairs over pores in the carapace with two or three attached neurons, functioning in vibration and water movement ...
Tullgren funnel
Apparatus designed by adj. H. Tullgren for extraction of animals from duff and litter; the sample is placed on a sieve and heat is applied from above to drive the animals ...
tumefaction
n. [L. tumere, to swell; facere, to make] Abnormal tissue formations in invertebrates having characteristics in common with vertebrate neoplasms, however, precise nature is ...
tumescence
n. [L. tumescere, to swell up] Slightly tumid or enlarged.
tumid
adj. [L. tumere, to swell] Swollen; enlarged; abnormally distended.
tumulus
n. [L. tumulus, mound] (ARTHROPODA: Insecta) In Apis, a pile of earth at the mouth of an underground burrow.
tun
n. [L. tunica, garment] (TARDIGRADA) A cryptobiotic shriveled, state of tardigrades produced by evaporation of surrounding water film.
tunic
n. [L. tunica, garment] A covering membrane or tissue.
tunica
n.; pl. -cae [L. tunica, garment] 1. A covering or enveloping membrane or tissue; a tunic. 2. (ARTHROPODA: Insecta) For Lepidoptera see diaphragm.
tunica adventitia
Outermost fibro-elastic layer of various tubular organs, such as vas deferens, esophagus, uterus, ureter, etc.
tunica intima
An inner lining or membrane.
tunica propria
(ARTHROPODA: Insecta) In females, an elastic membrane, with or without fine fibrils, that encloses the ovariole and terminal filament.
tunicary
adj. [L. tunica, garment] Pertaining to a covering membrane or a tunic.
tunicate
adj. [L. tunica, garment] 1. Having a tunic. 2. (ARTHROPODA) Applied to coupling joint of antennae.
turbinate
adj. [L. turbo, a whirl] Top-shaped; nearly conical with a round base; turbiniform.
turbinate eye
(ARTHROPODA: Insecta) In male Baetidae Ephemeroptera, eyes enlarged, divided into lower and outer pigmented ovals and raised on a broad stalk, with larger upper and inner ...
turgid
adj. [L. turgidus, swollen] Swollen; distended.
turreted
adj. [L. turris, a tower] Tower-shaped.
turriculate
adj. [L. dim. turris, tower] (MOLLUSCA: Gastropoda) Having an acutely conical spire comprised of numerous flattish whorls; turriform; turrited.
tychoparthenogenesis
n. [Gr. tyche, change; parthenos, virgin; genesis, beginning] Unfertilized eggs that can occasionally, or accidentally, develop through parthenogenesis.
tylasters
n. [Gr. tylos, knob; aster, star] (PORIFERA) A starshaped spicule with a small center and knobbed rays.
tylenchoid esophagus
(NEMATODA: Secernentea) An esophagus with a narrow procorpus, a strongly formed median bulb (metacorpus), followed by a narrow typical isthmus and terminating with a ...
tyloid
n.; pl. tyloides [Gr. tylos, knob] (ARTHROPODA: Insecta) In Trigonalidae and Ichneumonidae, any large indented, flattened or raised sensory area on the antennae.
tylosis
n.; pl. -es [Gr. tylos, knob] A hardening or thickening; a callous.
tylostyle
adj. [Gr. tylos, knob; stylos, column] (PORIFERA) A monactinal monaxon knobbed at the broad end and pointed at the other; see subtylostyle.
tylote
n. [Gr. tylos, knob] (PORIFERA) A diactional monaxon in which both broad ends are knobbed.
tylus
n.; pl. tyli [Gr. tylos, knob] (ARTHROPODA: Insecta) The distal part of the clypeal region of the head.
tymbal
n. [F. timbale, kettledrum] (ARTHROPODA: Insecta) In Hemiptera (Cicadidae), an area of thin cuticle supported by a cuticular rim and a series of dorso-ventral strengthening ...
tympanal air chamber
(ARTHROPODA: Insecta) An air-sac or space, usually posterior to the tympanal organ into which outside air is admitted by a spiracle allowing the tympanum to vibrate freely.
tympanal bullae
see tympanal hood.
tympanal fossa
(ARTHROPODA: Insecta) In Diptera, a largely membranous area between the suprasquamal ridge and the lower margin of the postalar wall.
tympanal frame
(ARTHROPODA: Insecta) The supporting framework of the tympanal membrane.
tympanal hood
(ARTHROPODA: Insecta) In some Lepidoptera, one of a pair of tubercles or rounded prominences on the dorsal surface at the base of the first abdominal segment.
tympanal organs
(ARTHROPODA: Insecta) Specialized chordotonal organs that occur on prothoracic legs, mesothorax, metathorax, or abdomen; the auditory organ or eardrum.
tympanal pockets
(ARTHROPODA: Insecta) In Lepidoptera, pockets in the tympanal frame, usually 4 in number.
tympanal ridge
(ARTHROPODA: Insecta) In some Diptera, a rib-like sclerite forked anteriorly, forming a single or double Y that encloses the tympanic pit.
tympanic pit
(ARTHROPODA: Insecta) In Diptera, a membranous area opening toward the base of the wing, enclosed by the two lowermost arms of the tympanal ridge.
tympanum
n.; pl. -ana [Gr. tympanon, drum] (ARTHROPODA: Insecta) A vibrating membrane involved in hearing; typanic membrane; an auditory membrane.
Tyndall colors or scattering
(ARTHROPODA: Insecta) Color of certain insects resulting from interference of light reflected by granules cast upon an absorbing layer of dark pigment beneath a more or less ...
type
n. [Gr. typos, type] A zoological object that serves as the base for the name of a taxon.
type by absolute tautonomy
see type by original designation.
type by elimination
A type designated when some of the original species of a genus have been transferred to other genera, the type of the genus selected from among the original species that ...
type by original designation
A species designated as type in the original publication of a genus. a. If in the original publication of a genus, typicus or typus is used for any of the species. b. The ...
type by virtual tautonomy
An original species of a genus that has a specific or subspecific name, either as a valid name or a synonym, is virtually the same as the generic name, or of the same origin ...
type genus
In families, the specific genus on which the family is founded, not necessarily the first one described.
type host
A designated organism from which a type specimen has been collected.
type locality
The area from which a holotype, lectotype, or neotype was collected.
type method
The method by which the name for a taxon is unquestionably associated with a definite zoological object belong to the taxon.
type species
The species which was used by the author of a genus to designate as type of a nominal genus.
typhlosole
n. [Gr. typhlos, blind; solen, channel] A longitudinal infolding of the dorsal intestinal wall into the intestinal lumen.
typologist
n. [Gr. typos, type; logos, discourse] One who disregards variation and who considers the members of a population as replicas of the type.
typolysis
n. [Gr. typos, type; lysis, loosing] Phylogerontic; stage that precedes extinction of a type organism or group.
typostasis
n. [Gr. typos, type; stasis, standing] A static phase in evolution.
U-shaped notal ridge
see scutoscutellar suture.
uliginose
См. uliginous.
uliginous
adj. [L. uliginosus, swampy] Of or pertaining to mud; swampy.
ultradextral
adj. [L. ultra, beyond; dexter, right] (MOLLUSCA: Gastropoda) Having a shell appearing to be sinistral but soft parts organized dextrally; hyperstrophic.
ultrasinistral
adj. [L. ultra, beyond; sinister, left] (MOLLUSCA: Gastropoda) Having a shell appearing to be dextral but soft parts organized sinistrally; hyperstrophic.
ultrasonic
adj. [L. ultra, beyond; sonus, sound] High frequency sounds inaudible to the human ear.
ultrastructure
n. [L. ultra, beyond; struere, to construct] The fine structure of cells seen with an ultramicroscope or an electron microscope.
umbel
n. [L. umbella, a sunshade] 1. An arrangement in which a number of processes, nearly equal in length, spread from a common center. 2. (CNIDARIA: Anthozoa) In Umbellulidae, ...
umbilical suture
(MOLLUSCA: Gastropoda) In phaneromphalous type shells, a continuous line separating successive whorls.
umbilicus
n.; pl. -lici [L. umbilicus, navel] 1. A navel, or navel- like depression. 2. (MOLLUSCA: Gastropoda) A cavity formed around the shell axis between the faces of the adaxial ...
umbo
n.; pl. umbones, umbos [L. umbo, knob or boss] 1. (ARTHROPODA: Crustacea) a. In Cirripedia, a portion of the plate from which successive growth increments extend. b. In ...
umbo-veliger
(MOLLUSCAL:Bivalvia) In oysters, the last larval stage.
umbonal angle
(MOLLUSCA: Bivalvia) In pectinoid shells, the angle of divergence of the umbonal folds; in other shells the divergence of the posterodorsal and anterodorsal parts of the ...
umbonal cavity
(MOLLUSCA: Bivalvia) 1. Part of the valve interior which lies within the umbo and under the hinge plate. 2. In oysters, that part of the left valve interior lying in the ...
umbonal depression
(MOLLUSCA: Bivalvia) A depression at the umbo tip.
umbonal fold
(MOLLUSCA: Bivalvia) In pectinoid shells, a ridge originating at the umbo and setting the auricle off from the shell body.
umbonal pole
(MOLLUSCA: Bivalvia) The point of maximum curvature of the longitudinal profile of the dorsal valve.
umbonal reflection
(MOLLUSCA: Bivalvia) The reflection of the dorsal margin of the valves anterior to and usually over the umbos.
umbonal region
(MOLLUSCA: Bivalvia) The region of the umbo.
umbonal spine
(ARTHROPODA: Crustacea) In Conchostraca, a hollow, curved, looped or nodular spinose projection of variable size, sometimes covering the entire umbo.
umbone
see umbo.
umboniform
adj. [L. umbo, knob or boss; forma, shape] 1. Like or shaped like an umbo. 2. (MOLLUSCA: Gastropoda) Having a low blunt or rounded spire, nearly lenticular in shape; ...
umbonuloid
adj. [L. umbo, knob or boss; Gr. eidos, like] (BRYOZOA: Gymnolaemata) In cheilostomates, autozooids having frontal shields formed by calcification of the basal side of ...
umbraculate
См. umbraculiferous.
umbraculiferous
adj. [L. umbraculum, sunshade] Bearing an umbrella-like structure or organ.
umbrella
n. [L. dim. umbra, shade] 1. Any umbrella-shaped structure. 2. The ectodermal cells located anterior to the preoral band of cilia in the development of a trochophore ...
umbrella organ
see sensillum campaniformium.
unarmed
adj. [A.S. un-, not; L. arma, arms] Without armature of any kind, i.e., shield, spurs, spines, plates, teeth, etc.
unarticulate
adj. [A.S. un-, not; L. articulare, to divide] Not jointed or segmented.
uncate
adj. [L. uncus, hook] Hooked; hamate.
unci
pl. uncus.
unciform
adj. [L. uncus, hook; forma, shape] Hook-shaped.
uncinal plate
see radula.
uncinal seta
(ANNELIDA: Polychaeta) Setae modified into hooks, functioning in feeding or gripping.
uncinate
adj. [L. uncinus, hook] 1. Hooked or barbed at the end; unciniform. 2. (PORIFERA) Pertaining to megascleres, a fusiform oxea with thornlike spines.
uncinate mastax
(ROTIFERA) A mastax with fulcrum and manubria greatly reduced, stout rami, and large subunci; specialized for food laceration.
uncini
n.pl; sing. uncinus [L. uncinus, hook] 1. (ANNELIDA: Polychaeta) Deeply embedded seta with only its multidentate head showing above the cuticle. 2. (MOLLUSCA: Gastropoda) ...
uncus
n.; pl. unci [L. uncus hook] 1. (ARTHROPODA: Insecta) a. In some larvae, a hooked process on the distal inner margin of the maxillary mala, possibly a reminant of the ...
undate
adj. [L. unda, wave] Wavy, undulating.
underbridge
n. [A.S. under, below; bricg, bridge] (NEMATODA: Secernentea) In Heterodera cysts, a structure extending across the vulval cone below and parallel to the vulval bridge.
undifferentiated
adj. [A.S. un-, not; L. differens, dissimiler] 1. Immature or embryonic form; unspecialized; capable of differentiation into more specialized form. 2. With cells, meaning ...
undose
adj. [L. unda, wave] Undulating; nearly parallel depressions blending more or less into each other.
undulate
adj. [L. unda, wave] Having a wavy surface or margin.
ungual
adj. [L. unguis, claw] Pertaining to the ungues or claws.
unguiculus
n.; pl. unguiculi [L. dim. unguis, claw] 1. A small terminal claw or nail-like process. 2. (ARTHROPODA: Insecta) The smaller of the toothed tarsal claws of Collembola; ...
unguifer
n. [L. unguis, claw; ferre, to bear] (ARTHROPODA: Insecta) A median process of the last tarsomere, articulating with the pretarsal claws.
unguiferate
adj. [L. unguis, claw; ferre, to bear] (PORIFERA) Pertaining to a type of chelate microsclere with short and discrete teeth, often more than three at each end of the ...
unguiflexor
n. [L. unguis, claw; flectere, to bend] (ARTHROPODA: Insecta) Muscles responsible for moving or extending the ungues.
unguiform
adj. [L. unguis, claw; forma, shape] Shaped like a claw.
unguis
n.; pl. ungues [L. unguis, claw] (ARTHROPODA) 1. The lateral claw of the pretarsus of several groups. 2. The larger of the toothed tarsal claws of Collembola; ungual a; ...
unguitractor
n. [L. unguis, claw; tract, to pull] (ARTHROPODA: Insecta) A ventral sclerotized plate of the pretarsus from which arises the retractor muscles of the ungues or claws; ...
unguitractor tendon
(ARTHROPODA: Insecta) The tendon serving for attachment of the unguitractor to the pretarsal depressor muscle; apodeme.
ungula
see unguis.
uniauriculate
adj. [L. unus, one; auricula, outer ear] Having a single ear-like process.
unibranchiate
adj. [L. unus, one; branchia, gill] Having one gill.
unicameral
adj. [L. unus, one; camera, chamber] Having one chamber.
unicapsular
adj. [L. unus, one; capsula, little box] Having only a single capsule.
unicarinate
adj. [L. unus, one; carina, keel] Having a single ridge or keel.
unicellular
adj. [L. unus, one; cellula, small chamber] Consisting of only one cell.
uniciliate
adj. [L. unus, one; cilium, eyelash] Having a single cilium or flagellum.
unicolonial
adj. [L. unus, one; colere, to dwell] (ARTHROPODA: Insecta) A population of social insects not recognizing nest boundaries; multicolonial.
unicolorate
adj. [L. unus, one; color, tint] Having one color throughout.
unicornous
adj. [L. unus, one; cornu, horn] Having only one horn.
unicuspid
adj. [L. unus, one; cuspis, point of spear] Having a single tapering point; one tooth.
unidentate
adj. [L. unus, one; dens, tooth] Having only one tooth.
unidiverticulate
adj. [L. unus, one; diverticulum, bypath] Having one diverticulum.
uniflagellate
adj. [L. unus, one; flagellum, whip] With one flagellum; monociliated.
unifollicular
adj. [L. unus, one; folliculus, small bag] Having one follicle.
unigeminal
adj. [L. unus, one; geminus, twin-born] 1. With one pair. 2. (ECHINODERMATA: Echinoidea) Pertaining to one row of pore pairs.
unilabiate
adj. [L. unus, one; labium, lip] Having one lip.
unilaminate colony
(BRYOZOA) A colony consisting of a single layer of zooids opening in approximately the same direction.
unilateral
adj. [L. unus, one; latus, side] On one side only.
unilocular
adj. [L. unus, one; loculus, small place] Having one cell or cavity.
uniloculate
adj. [L. unus, one; loculus, small place] (ANNELIDA) Having only one seminal chamber, such as the spermathecal diverticulum.
unimucronate
adj. [L. unus, one; mucro, sharp point] Having a single sharp tip.
uninominal
adj. [L. unus, one; nomen, name] Having only one name; monominal.
uninominal nomenclature
The designation of a taxon above species rank by a scientific name consisting of a single word.
uniordinal crochets
(ARTHROPODA: Insecta) In larvae, crochets arranged in a single row of uniform length or somewhat shorter towards the ends of the row; see ordinal.
uniparous
adj. [L. unus, one; parere, to beget] Producing one egg or young at a time.
uniplicate
adj. [L. unus, one; plicare, to fold] Having a single fold or line of folding.
unipolar
adj. [L. unus, one; polus, pole] Having one pole only.
unipolar cell
A nerve cell with one fiber issuing from it.
uniradiate
adj. [L. unus, one; radius, wheel spoke] One-rayed.
uniramous
adj. [L. unus, one; ramus, branch] Having one branch only.
uniramous appendage
(ARTHROPODA) An unbranched appendage.
uniramous parapodium
(ANNELIDA: Polychaeta) A parapodium that has only one part.
uniseptate
adj. [L. unus, one; septum, partition] Having one partition.
uniserial
adj. [L. unus, one; series, row] Arranged in one row or serial.
uniserial circle
(ARTHROPODA: Insecta) Referring to crochets of larvae arranged in a single row or series with bases in a continuous line; see serial crochets.
uniserrate
adj. [L. unus, one; serra, saw] One row of serrations.
unisexual
adj. [L. unus, one; sexus, male or female sex] Individuals having separate sexes (dioecious, gonochoric) and producing only one kind (male or female) of gamates, therefore, ...
unispire
adj. [L. unus, one; spira, coil] A single turn of a spiral.
unit character
A trait behaving as a unit in heredity, inheritable independently of other traits.
univalent
adj. [L. unus, one; valens, strong] One member of a pair of homologous chromosomes.
univalve
adj. [L. unus, one; valva, leaf of a folding door] (MOLLUSCA: Bivalvia) Having a shell composed of one piece.
univariate analysis
A biometric analysis of one character.
univoltine
adj. [L. unus, one; It. volta, time] Having one generation a year; monovoltine.
unjointed seta
(ANNELIDA: Polychaeta) A seta without a joint; a simple seta.
unmyelinated
adj. [A.S. un, not; Gr. myelos, marrow] Nerves not covered with a myelin sheath.
unspecialized
adj. [A.S. un, not; L. species, a particular kind] Lacking modifications for any special function or purpose.
unsuitable host
An immune or resistant animal or plant.
upcurved growth line
(ARTHROPODA: Crustacea) In Conchostraca, an upwardly bent growth line covering a tear in the shell margin at the site of an injury.
upper latus
(ARTHROPODA: Crustacea) In Lepadomorph barnacles, the plate in the upper whorl between the scutum and tergum or carina.
upper lip
see labrum.
upsilon
see furca.
uranidin
see pterine.
urate
adj. [Gr. ouron, urine] A salt of uric acid.
urate cells
(ARTHROPODA: Insecta) Special cells of the fat-body or in the epidermis or elsewhere that segregate the uric acid, when not excreted through the Malpighian tubules.
urceolus
n. [L. dim. urceus, pitcher] A pitcher- or urn-shaped structure.
urea
n. [Gr. ouron, urine] A simple organic compound, CO(NH 2 ) 2 , a major nitrogenous waste product.
ureter
n. [Gr. ureter] 1. (ARTHROPODA: Insecta) A discharging duct of aggregate Malphigian tubules. 2. (MOLLUSCA: Gastropoda) A duct connecting the kidney with the mantle cavity. ...
uric acid
A nitrogenous waste product, more complex and usually formed in smaller amounts than urea.
uricotelic
adj. [Gr. ouron, urine; telos, end] The excretion of nitrogen as uric acid.
urinary vessels
see Malphigian tubules.
urine
n. [L. urina, urine] A solution of various waste products.
urite
see cirrus.
urn bodies
1. (MESOZOA: Rhombozoa) An urn-like sac on the ventral surface of infusoriform larvae of a dicyemid that contains four germinal cells. 2. (SIPUNCULA) Vase-shaped, ...
urocardiac ossicle
(ARTHROPODA: Crustacea) In a decapodan gastric mill, a T-shaped plate running backwards and downwards, sometimes bearing a U- or V-shaped median tooth.
urogastric groove
(ARTHROPODA: Crustacea) A short transverse groove in the median or submedian region of a decapod carapace posterior to the postcervical groove, sometimes joining the upper ...
urogastric lobe or area
(ARTHROPODA: Crustacea) In Decapoda, a posterior division of the gastric region of a brachyuran carapace; genital region.
urogenital
adj. [L. urina, urine; gignere, to beget] Of or pertaining to the urinary and genital system.
urogenital opening
(MOLLUSCA: Bivalvia) Opening through which the gonadal products and excretory products are released into the cloacal passage of the exhalant mantle chamber.
urogomphi
n. pl.; sing. urogomphus [Gr. oura, tail; gomphos, club] (ARTHROPODA: Insecta) In Coleoptera larvae, a pair of outgrowths of the tergum of segment 9 in the form of short ...
uromere
n. [Gr. oura, tail; meros, part] (ARTHROPODA) An abdominal segment.
uropatagium
n.; pl. uropatagia [Gr. oura, tail; patagium, border] (ARTHROPODA: Insecta) One of the paraprocts located on either side of the anus.
uropod(ite)
n. [Gr. oura, tail; pous, foot] (ARTHROPODA: Crustacea) 1. In Malacostraca, an appendage of the 6th abdominal somite, fanlike or reduced or modified. 2. In Amphipoda, the ...
uropolar cells
(MESOZOA: Rhombozoa) In Dicyemida, somatoderm cells at the posterior end of the trunk.
uropore
n. [Gr. ouron, urine; poros, passage] (ARTHROPODA: Chelicerata) In Prostigmata and Tarsonemida, an external opening of the excretory duct in groups that have an incomplete ...
urosoma
n. [Gr. oura, tail; soma, body] 1. (ARTHROPODA) The abdomen. 2. (ARTHROPODA: Crustacea) That part of the body posterior to the major articulation, usually including last ...
urosome
См. urosoma.
urosternite
n. [Gr. oura, tail; sternon, chest] (ARTHROPODA) The sternal or ventral part of the uromeres.
urotergite
n. [Gr. oura, tail; L. tergum, back] (ARTHROPODA) An abdominal tergite.
urstigmata
n. pl.; sing. urstigma [Ger. ur, primitive; Gr. stigma, mark] (ARTHROPODA: Chelicerata) In Acari, sense organs between the coxae of the first and second pairs of legs; ...
urticate
v. [L. urtica, nettle] To sting or burn. urtication n; see nematocyst.
urticating hairs
(ARTHROPODA: Insecta) In some caterpillars and adults, bristles with minute lateral points producing marked irritation upon contact, whether due to mechanical action alone or ...
urticator
n. [L. uritica, nettle] (CNIDARIA) Cnidocytes; a nettle or sting cell.
urzellen
see prohemocyte.
ustulate
adj. [L. ustulatus, scorch or burn] Having the appearance of being scorched or burned; brownish.
uterine bell
(ACANTHOCEPHALA) A bell-like or tubular structure of some females, that moves eggs from the pseudocoel to the uterus.
uterine vagina
see vagina uterina.
uterus
n. [L. uterus, womb] An enlargement of the lower end of the oviduct, in which eggs are retained temporarily or in which the embryo develops; uterine adj..
utricle
n. [L. dim. uter, bag] A small bag or bladder.
utriculus
n. [L. dim. uter, bag] (ARTHROPODA: Insecta) In Lepidoptera, the larger lobe of the spermatheca; may be fused into one organ; see lagena.
uvette
n. [L. dim. uva, grape] (NEMATODA: Adenophorea) The glandular region where the efferent tubes of the Demanian vessels meet before passing on to one or more exit pores in ...
vacuole
n. [L. vacuus, empty] A minute cavity within a cell, usually filled with a liquid product of protoplasmic activity. vacuolar adj..
vagile
adj. [L. vagus, wandering] Freely wandering; motile.
vagility
n; see sessile.
vagina
n. [L. vagina, sheath] The terminal portion of the female reproductive tract, that opens to the outside; vaginal adj..
vagina uterina
(NEMATA) An inward extension of the vagina, uniting with the distal part of the uterus, that histologically resembles the vagina, but lacks cuticular lining.
vagina vera
(NEMATA) The outermost part of the vagina, lined with cuticle.
vaginate
adj. [L. vagina, sheath] Enclosed by a sheath.
vaginipennate
adj. [L. vagina, sheath; penna, wing] (ARTHROPODA: Insecta) To ensheath a wing; having wings covered with a hard sheath.
vaginula
n. [L. dim. vagina, sheath] (ARTHROPODA: Insecta) The covering of the terebra.
vagus
see stomogastric nervous system.
valency
n. [L. valentia, strength] Power; important; value.
valid name
An available name for a taxon that is not preoccupied by a valid senior synonym or homonym.
valva
n.; pl. valvae [L. valva, leaf of a folding door] (ARTHROPODA: Insecta) In Lepidoptera, a valve in the external male genitalia; the coxite and the stylus; see harpagones. ...
valvate
adj. [L. valva, leaf of a folding door] 1. Furnished with valves. 2. Hinged only at the margin. 3. Of or pertaining to a valve.
valve
n. [L. valva, leaf of a folding door] 1. Any structure that limits or closes an opening. 2. One of the discrete shells or plates of a mollusk, brachiopod or crustacean. 3. ...
valve coverage
(MOLLUSCA: Polyplacophora) 1. Complete coverage Two contiguous valves with the rear edge of one covering the whole front edge of the one posterior to it. 2. Partial ...
valvelet
n. [L. dim. valva, leaf of a folding door] A small valve or fold.
valvifers
n. pl. [L. valva, leaf of a folding door; ferre, to bear] (ARTHROPODA: Insecta) The basal plates of the ovipositor, derived from the basal segment of the gonopods; also ...
valvula
n.; pl. valvulae [L. dim. valva, leaf of a folding door] 1. Any small valve-like process. 2. (ARTHROPODA: Insecta) In Hymenoptera, processes from the valvifers forming the ...
valvular
adj. [L. dim. valva, leaf of a folding door] Of or pertaining to a small valve or valvula.
vannal fold
(ARTHROPODA: Insecta) A radial line of folding of a wing, commonly between the cubital field and the first vannal vein; sometimes variable.
vannal lobe
(ARTHROPODA: Insecta) A lobe in the anal area of a wing, immediately distad of the jugal lobe (when present).
vannal region
(ARTHROPODA: Insecta) That part of the wing comprising the vannal veins, or veins directly associated with the third axillary; vannus.
vannal veins
(ARTHROPODA: Insecta) The veins of a wing in the vannal region, with basal association with the third axillary sclerite.
vannus
see vannal region.
variance
n. [L. variare, to change] A sampling statistic relating to deviations from the mean.
variate
n. [L. variare, to change] A variable quantity or character.
variation
n. [L. variare, to change] Differences resulting from nongenetic responses of the phenotype to immediate environmental conditions; ecophenotype.
varicellate
adj. [L. varix, dilation] Having small or indistinct varices.
varices
pl. of varix.
varicose
adj. [L. varix, dilation] Bearing a varix or varices.
variegated
adj. [L. variegatus, of different sorts] Marked by different shades or colors.
variety
n. [L. variare, to change] An ambiguous taxonomic term for a heterogeneous group of phenomena including nongenetic variations of the phenotype, morphs, domestic breeds, and ...
variole
n. [F. variole, smallpox] A pock-like mark; fovea; fossa; variolate adj..
varix
n.; pl. varices [L. varix, dilation] (MOLLUSCA: Gastropoda) Transverse elevations that occur on the outer shell surface; more prominent than the costa and generally spaced ...
vas
n.; pl. vasa [L. vas, vessel] A small tubular vessel, duct or canal, especially leading from the testis.
vas deferens
sing.; pl. vasa deferentia. 1. A sperm duct leading away from a testis. 2. (ANNELIDA: Oligochaeta) A duct carrying sperm from the male funnel to the male pore.
vas efferens
sing.; pl. vasa efferentia Tubule leading from the testis to the vas deferens.
vascula
n. pl.; sing. -um [L. dim. vas, vessel] (BRACHIOPODA) Branches of the mantle canal system.
vascular
adj. [L. dim. vas, vessel] Pertaining to vessels adapted for transmission or circulation of fluids.
vascular markings
(BRACHIOPODA) Impressions of the mantle canals on the inside of the shell; pallial markings.
vasiform
adj. [L. vas, vessel; forma, shape] Vessel-shaped.
vector
n. [L. vehere, to carry] 1. Any carrier, particularly an animal that transmits a disease organism from one host to another. 2. In helminthic disease, an intermediate ...
vegetal pole
In an early embryo, a region with large cells with much yolk; portion of egg or zygote with more yolk than opposite end.
vegetative functions
All natural functions of living organisms that maintain life.
vegetative reproduction
The development of a new individual from a group of cells in the absence of any sexual process.
veinlets
n. pl. [L. dim. vena, vein] Small veins.

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