Слова на букву ooec-phen (732) Dictionary of invertebrate zoology
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Слова на букву ooec-phen (732)

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ooecia
n. pl.; sing. -ium [Gr. oion, egg; oikos, house] (BRYOZOA: Gymnolaemata) In Cheilostomata, the outer protective part of an ovicell; sometimes thought to be zooid morphs; a ...
ooecial vesicle
(BRYOZOA: Gymnolaemata) In Cheilostomata, an inner membrane of an ooecium.
ooeciostome
n. [Gr. oion, egg; oikos, house; stoma, mouth] (BRYOZOA: Stenolaemata) The gonozooidal orifice, may or may not have peristome surrounding the aperture of ovicell.
ooecium
n. [Gr. oion, egg; oikos, house] (BRYOZOA) An ovicell or brood pouch.
oogamy
n. [Gr. oion, egg; gamos, marriage] The union during fertilization of a nonmotile female gamete and a motile male gamete; oogamous a; see anisogamy, isogamy.
oogenesis
n. [Gr. oion, egg; genesis, beginning] The development of the female egg cell or ovum that takes place in the gonad.
oogenotop
n. [Gr. oion, egg; genesis, beginning; topos, place] (PLATYHELMINTHES: Cestoda) A small cellular complex following the oviduct within the female reproductive system where ...
oogone
see oogonium.
oogonium
n.; pl. oogonia [Gr. oion, egg; gonos, offspring] A germ cell that gives rise to the oocytes by mitotic division.
ookinete
n. [Gr. oion, egg; kinetos, move] (ARTHROPODA: Insecta) A motile, elongate zygote of a Plasmodium that encysts in the stomach wall of a Culicidae.
oolemma
see vitelline membrane.
oophagy
n. [Gr. oion, egg; phagein, to eat] 1. The eating of eggs; egg cannibalism. 2. (ARTHROPODA: Insecta) In social insects, eating its own or nestmate\'s eggs.
oophore
n. [Gr. oion, egg; phoreus, carrier] (ANNELIDA: Oligochaeta) The egg case or capsule.
ooplasm
n. [Gr. oion, egg; plasma, formed or molded] The cytoplasm of an egg.
oopod
n. [Gr. oion, egg; pous, foot] (ARTHROPODA: Insecta) A component part of a sting or ovipositor.
oosperm
n. [Gr. oion, egg; sperma, seed] A fertilized ovum; a zygote; an ooblastema.
oosphere
n. [Gr. oion, egg; sphaira, ball] An unfertilized egg.
oostegite
n. [Gr. oion, egg; stege, roof] (ARTHROPODA: Crustacea) In female Peracarida, modified thoracic lamella arising from the coxa of the pereopod that forms a pouch ...
oostegopod
n. [Gr. oion, egg; stege, roof; pous, foot] (ARTHROPODA: Crustacea) 1. Thoracic limb bearing an oostegite. 2. An appendage of the genital somite that forms a brood ...
ootheca
n.; pl. -cae [Gr. oion, egg; theke, case] (ARTHROPODA: Insecta) The covering or case over an egg or egg mass.
ootid
n. [Gr. oion, egg; eidos, form] One of the four meiotic products arising in oogenesis.
ootocous
adj. [Gr. oion, egg; tokos, delivery] Egg laying.
ootype
n. [Gr. oion, egg; typos, type] (PLATYHELMINTHES: Trematoda) A small chamber of the female duct, surrounded by Mehlis\' glands, where ducts from a seminal receptacle and ...
oozooid
n. [Gr. oion, egg; zoon, animal; eidos, form] Any individual developed from an egg, not fragmented or budded; see blastozooid.
opaline
adj. [L. opalus, opal] Opalescent; bluish or milky white with iridescent luster.
opaque
adj. [L. opacus, shady] Not transparent or translucent.
open cell
(ARTHROPODA: Insecta) A wing cell that extends to the wing margin.
open coxal cavity
(ARTHROPODA: Insecta) In Coleoptera, when the coxal cavity is only bridged over by the membrane.
open population
A population freely exposed to gene flow.
opercular membrane
(ARTHROPODA: Crustacea) In Balanomorpha, a thin, flexible membrane attaching the opercular valves to the sheath; in Verrucomorpha, a membranous hinge.
opercular plug or spot
(NEMATA) An escape zone or plug by which a larva leaves the egg membrane.
opercular scar
(BRYOZOA: Gymnolaemata) In Cheilostomata, a trace of a cuticular operculum in the frontal closure of the autozooid.
opercular valves
(ARTHROPODA: Crustacea) In sessile Cirripedia, movable plates (2 or 4) occluding the aperture.
operculate
adj. [L. operculum, lid] Having a lid or operculum.
operculiform
adj. [L. operculum, lid; forma, shape] Having the shape of a lid or cover.
operculigenous
adj. [L. operculum, lid; Gr. gennaein, to produce] Producing an operculum.
operculigerous
adj. [L. operculum, lid; gero, bear] Having an operculum.
operculum
n.; pl. opercula [L. operculum, lid] 1. A lid or flaplike cover. 2. (ANNELIDA: Polychaeta) In certain sedentary forms, a modified tentacle that closes the tube; in some ...
opere citato
L. Work cited; op. cit.; op. c.
operon
n. [L. opera, work] Adjacent series of nucleiotides that codes for messenger RNA molecules.
opesiule
n. [Gr. dim. ope, hole] (BRYOZOA: Gymnolaemata) One of the small notches or pores in a cryptocyst through which the frontal membrane depressor muscles pass.
opesium
n.; pl. -ia [Gr. dim. ope, hole] (BRYOZOA: Gymnolaemata) In Anasca, a large opening below the frontal membrane bordered by the cryptocyst; functioning as a passageway for ...
ophiopluteus
n. [Gr. ophis, serpent; pluteus, shed] (ECHINODERMATA: Ophiuroidea) Brood larva of Phrynophiurida, with arms edged with cilia, that metamorphose into adults after escape ...
ophirhabd
n. [Gr. ophis, serpent; rhabdos, rod] (PORIFERA) A megasclere with oxea curved in several places; see eulerhabd.
ophiurida
n. [Gr. ophis, serpent; oura, tail] (ECHINODERMATA: Ophiuroidea) Simple arms with usually lateral, not verticle movement.
Ophiuroidea
См. ophiuroids.
ophiuroids
n.; n. pl. [Gr. ophis, serpent; oura, tail; eidos, form] A Class of Echinodermata, with narrow, gradually tapered arms, sharply offset from the central disk, generally 6 or ...
ophthalmic
adj. [Gr. ophthalmos, eye] Pertaining to the eye.
ophthalmocercaria
n. [Gr. ophthalmos, eye; kerkos, tail] (PLATYHELMINTHES: Trematoda) A cercaria with eyespots.
ophthalmopod
n. [Gr. ophthalmos, eye; pous, foot] (ARTHROPODA: Crustacea) In Malacostraca, an eye-stalk; a movable peduncle with a terminal eye.
ophthalmotheca
n. [Gr. ophthalmos, eye; theke, case] (ARTHROPODA: Insecta) That part of the pupal case that covers the eyes.
opisthaptor
n. [Gr. opisthen, behind; haptein, to fasten] (PLATYHELMINTHES: Trematoda) In Monogenea, the posterior attachment organ (sucker or disc); see Baer\'s disc.
opisthocline
adj. [Gr. opisthen, behind; clinein, to lean] 1. Leaning backward. 2. (MOLLUSCA: Gastropoda) The growth direction of a helicocone shell; commonly referring to growth ...
opisthocyrt
adj. [Gr. opisthen, behind; kyrtos, curved] 1. Arched backward. 2. (MOLLUSCA: Bivalvia) Referring to sloping in a direction posterior from the hinge axis; used to describe ...
opisthodelphic
adj. [Gr. opisthen, behind; delphys, womb] (NEMATA) Having uteri parallel and posteriorly directed; see amphidelphic, monodelphic, prodelphic, didelphic.
opisthodetic
adj. [Gr. opisthen, behind; detos, bind] (MOLLUSCA: Bivalvia) Said of the ligament that extends posterior to the umbo (beak); see amphidetic, parivincular.
opisthogenesis
n. [Gr. opisthen, behind; genesis, beginning] Development from posterior end of the body forward.
opisthognathous
adj. [Gr. opisthen, behind; gnathos, jaw] Having mouth parts directed posteriorly.
opisthogoneate
adj. [Gr. opisthen, behind; gonos, seed] Having the genital opening situated terminally, at the posterior end of the body; see progoneate.
opisthogonia
n. [Gr. opisthen, behind; gonia, corner] (ARTHROPODA: Insecta) The anal angle of the hind wings.
opisthogyrate
adj. [Gr. opisthen, behind; L. gyratus, revolve] 1. Curving backwards. 2. (MOLLUSCA: Bivalvia) Having the beak pointing posteriorly.
opisthohapter
see opisthaptor.
opisthomeres
n. pl. [Gr. opisthen, behind; meros, part] (ARTHROPODA: Insecta) In Dermaptera, the transversely divided epiproct; the so-called pygidium, metapygidium and telson.
opisthomerite
n. [Gr. opisthen, behind; meros, part] (ARTHROPODA: Diplopoda) The gonopods of Julida; the posterior part of the modified 9th pair of legs in the male.
opisthoparamere
n. [Gr. opisthen, behind; para, beside; meros, part] (ARTHROPODA: Insecta) In Diptera (Cyclorrhaphra), especially Calyptrata, one of two parameral processes; see proparamere.
opisthosoma
n. [Gr. opisthen, behind; soma, body] 1. (ARTHROPODA: Chelicerata) In Acari or Ixodida, that portion of the body posterior to the legs. 2. (POGONOPHORA) A terminal ...
opisthosomatic appendages
(ARTHROPODA: Chelicerata) Vestigial appendages present on the ventral regions of segments VII-XIII, such as genital papillae or valves.
opisthosomatic scissure
(ARTHROPODA: Chelicerata) In Acari, a narrow band of skin between sclerotized plates; often transverse on the opisthosoma.
opsiblastic
adj. [Gr. opsios, late; blastos, bud] A delay in cleavage, and therefore a prolonged period before hatching; winter egg; see tachyblastic.
optic
adj. [Gr. optikos, pertaining to sight] Pertaining to the eye or sense of sight.
optic lobes
Lateral extensions of the protocerebrum or nervous system for innervation of an eye.
optical isomerism
Compounds that are mirror images and differ in turning the plane of polarized light left (L-form) or right (D-form).
opticon
n. [Gr. opsis, sight] (ARTHROPODA: Insecta) The inner zone of the optic lobes.
optimum
adj. [L. optimus, best] The most suitable condition for the growth and development of an organism.
orad
adv. [L. os, mouth; ad, toward] Toward the mouth.
oral
adj. [L. os, mouth] Pertaining to or near the mouth.
oral arms
(CNIDARIA: Scyphozoa) In medusae, 4 or 8 often frilly oral arms, bearing cnidocytes and aid in the capture and ingestion of prey.
oral cavity
The mouth; the buccal cavity.
oral cone
(CNIDARIA: Hydrozoa) In polyps, a conical projection surrounded by tentacles with the mouth in the center.
oral disk
(CNIDARIA: Anthozoa) In polyps, a flattened area from which, usually 8 or multiples of 6, tentacles arise that communicate with the coelenteron.
oral hooks
see mandibular sclerites.
oral lappet
(MOLLUSCA) Basal expansion of labial tentacles; labial veil.
oral lobe
(CTENOPHORA) A muscular lobe on either side of the mouth in Lobata.
oral plate
(ARTHROPODA: Insecta) The hypopharyngeal floor of the cibarial pump.
oral segment
A ring or segment bearing the mouth.
oral spear
see stomatostyle, odontostyle.
oral styles
(KINORHYNCHA) Spines arranged in a series around the mouth cone.
oral surface
(ECHINODERMATA: Asteroidea) The entire undersurface of the disc and arms.
oral tentacles
(MOLLUSCA) Tentacle-like outgrowths of the lip.
oral valve
(ECHINODERMATA: Crinoidea) One of 5 low triangular flaps separating the ambulacral grooves.
oral vibrissae
(ARTHROPODA: Insecta) In certain Diptera, a pair of stout bristles or hairs on each side of the face, near or above the oral margin; larger than those on the vibrissal ...
orange rouge
(ARTHROPODA: Insecta) Cells with intracellular tracheoles.
orb
n. [L. orbis, circle] A circle or globe; orbicular adj..
orbit
n. [L. orbis, circle] 1. (ARTHROPODA) The part of the head surrounding an eye; orbital fossa. 2. (ARTHROPODA: Crustacea) In Decapoda, an opening in the anterior face of ...
orbital bristles
see facio-orbita.
orbital carina
(ARTHROPODA: Crustacea) In Decapoda, the narrow region on the margin of the orbit.
orbital fossa
see orbit.
orbital hiatus
(ARTHROPODA: Crustacea) Gap or slit in the orbital margin.
orbital plate
see genovertical plate.
orbital region
(ARTHROPODA: Crustacea) That part posterior to the eyes bordered by the frontal and antennal regions.
orbital tooth
(ARTHROPODA: Crustacea) A tooth on the orbital margin.
orchitic
adj. [Gr. orchis, testis] Of or pertaining to testicles.
order
n. [L. ordin, methodical arrangement] A taxonomic group; a subdivision of a class or subclass, containing a group of naturally related superfamilies or families.
ordinal
adj. [L. ordin, methodical arrangement] 1. Belonging or pertaining to an order. 2. (ARTHROPODA: Insecta) Crochets of larvae, describing the length or arrangements at the ...
ordinate
adj. [L. ordin, methodical arrangement] Arranged in rows, such as ornamentations or punctures.
oreillets
n. pl. [F. dim. oreille, projection] (ARTHROPODA: Insecta) Lateral, spinose processes of male Anisoptera and some Zygoptera on the second abdominal tergite, presumed to act ...
organ of Bellonci
(ARTHROPODA: Crustacea) Receptors innervated from the medullae terminales of the brain, consisting of ciliated sensory neurons associated with supporting cells, such as ...
organ of Berlese
see mesospermalege.
organ of Bojanus
(MOLLUSCA: Bivalvia) A kidney, especially in oysters.
organ of Hicks
see sensillum campaniformium.
organ of Hoyle
see Hoyle\'s organ.
organ of Johnston
see Johnston\'s organ.
organ of Kolliker
see Kolliker\'s organ.
organ of Ribaga
see mesospermalege.
organelle
n.; pl. -es, -ae [Gr. dim. organon, instrument] Any structure having a specialized function in the cytoplasm of the cell, such as mitochondria, nucleus, plastids, etc.
organism
n. [Gr. organon, instrument] Any individual living thing.
organization center
see organizer.
organizer
n. [Gr. organon, instrument] The region of an embryo seeming to control the differentiation and development of other cells; organization center; inductor; evocator.
organogenesis
n. [Gr. organon, instrument; genesis, beginning] Formation and development of organs in the embryo.
organogeny
see organogenesis.
organoid
n. [Gr. organon, instrument; eidos, kind] The body forming part of the cytoplasm.
organoleptic
adj. [Gr. organon, instrument; lambanein, to take hold of] Capable of receiving a sensory stimulus.
organotroph
see heterotroph.
organs of Tomosvary
(ARTHROPODA) A pair of sensory organs present on the head at the base of the antennae in Lithobiomorpha, Scutigeromorpha and some Insecta, consisting of a disc with a central ...
organs of Valenciennes
(MOLLUSCA: Cephalopoda) Paired lamellated organs in female nautiloids.
orichalceous
adj. [L. aurum, gold; Gr. chalkos, copper] A color or luster between gold and brass.
Oriental Realm
A zoogeographical region including Asia east of the Indus River, south of the Himalayas and the Yangtse- kiang watershed, Ceylon, Sumatra, Java and the Philippines.
orientation
n. [L. oriens, the rising sun] Sense of direction; a change in position.
orifice
n. [L. os, mouth; facere, to make] 1. An opening into a cavity; a mouth-like opening. 2. (ARTHROPODA: Crustacea) In sessile Cirripedia, the opening in the wall occupied by ...
orificial wall
(BRYOZOA) 1. In Gymnolaemata, an exterior zooidal wall that bears or defines the orifice through which the lophophore passes. 2. In Stenolaemata, an orifice through ...
original description
A statement of characters along with the proposal of a name for a new taxon.
orismology
n. [Gr. horos, boundary; logos, discourse] The science of defining technical or scientific words of a particular subject or field of study.
ornamentation
n. [L. ornare, to adorn] Sculpturing on the body of an animal or shell.
ornate cercaria
(PLATYHELMINTHES: Trematoda) A larval form in the Xiphidiocercaria group, with a tail fin fold; cercariae ornatae.
orphan nest
(ARTHROPODA: Insecta) In social insects, a nest containing offspring without adults.
orthocerous condition
(ARTHROPODA: Insecta) In some adult Coleoptera, antennae showing no sign of geniculation, the scape being longer than succeeding segments, and the club loose and ...
orthochromatic
adj. [Gr. orthos, straight; chromos, color] With normal staining characteristics.
orthochromatin
n. [Gr. orthos, straight; chromos, color] Stable chromatin.
orthocline
adj. [Gr. orthos, straight; clinein, to lean] (MOLLUSCA) At right angles to the growth direction of the helicocone, especially in oysters; growth lines.
orthodont hinge
(MOLLUSCA: Bivalvia) A hinge in which the teeth approximate the direction of the cardinal margin.
orthodromic
adj. [Gr. orthos, straight; dromos, running] Moving in a normal direction; see antidromic.
orthogenesis
n. [Gr. orthos, straight; genesis, beginning] Evolution following a predetermined rectilinear pathway, independent of natural selection.
orthognathous
adj. [Gr. orthos, straight; gnathos, jaw] Having straight mouth parts; not projecting.
orthogyral
См. orthogyrate.
orthogyrate
adj. [Gr. orthos, straight; gyrate, revolve] (MOLLUSCA: Bivalvia) Having the beak point at right angles to the hinge axis, especially oysters.
orthokinesis
n. [Gr. orthos, straight; kinesis, movement] A non-directional response in which the speed or frequency of activity depends on the intensity of stimulation; see ...
orthometaneme
n. [Gr. orthos, straight; meta, after; nema, thread] (NEMATA) A metaneme parallel to the longitudinal body line; found at the dorsal or ventral border of the lateral ...
Orthonectida
См. orthonectids.
orthonectids
n.; n. pl. [Gr. orthos, straight; nekton, swimming] A class of Mesozoa with an asexual parasitic plasmodial generation in many marine invertebrates and a sexual ...
orthoneury
n. [Gr. orthos, straight; neuron, nerve] (MOLLUSCA: Gastropoda) In forms with bilateral zygoneury, the condition of the visceral loop ganglia and crossed connectives ...
orthoploid
see euploid.
orthoselection
n. [Gr. orthos, straight; L. selectus, select] Natural selection continuously acting in one direction over a long period of time.
orthosomatic
adj. [Gr. orthos, straight; soma, body] Having a body in a straight line.
orthostasy
n. [Gr. orthos, straight; stasis, standing] (ARTHROPODA: Chelicerata) Stage in acarology life-cycle evolution showing only stases and no stasoids.
orthostrophic
adj. [Gr. orthos, straight; strophe, to turn] (MOLLUSCA: Gastropoda) Coiled in a normal manner, as opposed to hyperstrophic.
orthotaxy
n. [Gr. orthos, straight; taxis, arrangement] The arrangement of similar organs that have ancestral characters, and have preserved their normal position.
orthotriaenes
adj.pl. [Gr. orthos, straight; triaina, trident] (PORIFERA) In tetraxons, having clads in the angular form of about 90° with the axis of the rhabdome.
orthotrichy
n. [Gr. orthos, straight; trichos, hair] (ARTHROPODA: Chelicerata) In acarology, all setae that have not disappeared have maintained their ancestral position.
os
n.; pl. ora [L. os, oris, mouth] The mouth.
oscillation
n. [L. oscillare, to swing] A single swing from one extreme limit to the other of a sine wave.
osculant
adj. [L. osculare, to kiss] 1. Adhering closely. 2. A connecting link between two groups; having intermediate characters, as in genera and species.
oscular chimney
see osculum.
oscule
n.; pl. -la [L. dim. os, mouth] 1. (PORIFERA) A comparatively large exhalant aperture; an oscular chimney; see apopore. 2. (PLATYHELMINTHES: Cestoda) A sucker.
osculum
См. oscule.
osmeterium
n.; pl. osmeteria [Gr. osme, odor] (ARTHROPODA: Insecta) A fleshy, tubular, eversible pouch usually V or Yshaped, sometimes arising from cephalo- dorso-meson of the prothorax ...
osmiophilic
См. osmophilic.
osmium
see osmosium.
osmoconformer
n. [Gr. osmos, pushing; cum, with; forma, shape] An organism having the salt content of the blood determined by that of the surrounding sea water.
osmomorphosis
n. [Gr. osmos, pushing; morphos, form] Change in shape due to osmotic (salt) changes in the environment.
osmophilic
adj. [Gr. osme, smell; philein, to love] Staining readily with osmic acid.
osmoreceptors
n. pl. [Gr. osmos, pushing; recipere, to receive] Receptors that sense changes in osmotic pressure.
osmoregulation
n. [Gr. osmos, pushing; L. regulatus, regulated] Maintaining the osmotic pressure in the body by regulating the amount of water and salts, effected by the removal of salts, ...
osmosis
n. [Gr. osmos, pushing] Passage of water through a semi-permeable membrane from a solution of lower concentration to one of higher concentration until the solutions are equal ...
osmosium
n. [Gr. osmos, pushing] (NEMATA) A structure of modified intestinal tissue that protrudes into the tissue of the Demanian organ that is of gonadal origin.
osmotaxis
n. [Gr. osmos, pushing; taxis, arrangement] A response to osmotic pressure change.
osmotic
see osmosis.
osmotic pressure
Pressure required to prevent the flow of solvent through a membrane that has different concentrations of salt on either side.
osphradium
n.; pl. -dia [Gr. osphradion, strong smell] (MOLLUSCA) 1. In Gastropoda, a small sensory organ on the posterior margin of each afferent gill membrane that functions as a ...
osseous
adj. [L. os, ossis, bone] Composed of or resembling bone.
ossicle
n. [L. dim. os, ossis, bone] 1. A small nodule of chitin that resembles bone. 2. (ARTHROPODA: Crustacea) Teeth and tooth-like process in the gastric mill. 3. ...
ossiculum
n. [L. dim. os, ossis, bone] . 1. An ossicle. 2. (MOLLUSCA: Bivalvia) A small calcareous plate reinforcing an internal ligament; a lithodesma.
ostia
see ostium.
ostial
a; see ostium bursae.
ostiola
n. [L. ostiolum, little door] 1. Any small opening. 2. (ARTHROPODA: Insecta) In Heteroptera, one of paired dorsal abdominal scent gland openings; in adults, located near the ...
ostiolar peritreme
(ARTHROPODA: Insecta) The ridged, cuticular projections surrounding the ostiole, cresting and being subdivided into several smaller projections with ridges running parallel ...
ostiole
См. ostiola.
ostium
n.; pl. ostia [L. ostium, door] 1. Any opening to a passage, usually associated with a valve or circular muscle. 2. (ARTHROPODA) The paired slitlike openings in the ...
ostium bursae
(ARTHROPODA: Insecta) The copulatory entrance of the bursa copulatrix in female Lepidoptera, corresponding to the vulva of other female insects with the genital opening on ...
ostium oviductus
(ARTHROPODA: Insecta) In female Lepidoptera, the primary opening of the genitalia through which the eggs are laid, situated near the 9th abdominal segment.
ostracum
n. [Gr. ostrakon, shell] (MOLLUSCA: Bivalvia) 1. The entire calcareous part of the shell. 2. The outer part of the shell secreted at the mantle edge.
otidium
see statocyst.
otocrypt
n. [Gr. ous, ear; kryptos, hidden] (MOLLUSCA) An open invagination of the integument of the foot in certain mollusks.
otocyst
see statocyst.
otolith
see statolith.
otoporpae
n. pl. [Gr. ous, ear; porpe, pin] 1. (CNIDARIA: Hydrozoa) Lines of cnidoblasts on the exumbrella. 2. (CNIDARIA: Scyphozoa) Internal tissue tracts on the bell surface ...
outer coelomic space
(BRYOZOA: Stenolaemata) In free-walled forms, the coelomic space between the outer skeletal wall and the exterior membranous wall.
outer face
(MOLLUSCA: Gastropoda) In a shell whorl, the surface between the shoulder and the abapical suture or margin of base; same as side of whorl.
outer leaf crown
see corona radiata.
outer ligament
see lamellar ligament.
outer lip
(MOLLUSCA: Gastropoda) Labrum; the outer edge of the aperture of a univalve shell extending from the suture to the foot of the columella.
outer pigment cells
see accessory pigment cells.
outer plate
see quadrate plates.
outer squama
see alula.
outer vertical bristles
(ARTHROPODA: Insecta) In Diptera, the more laterally located of the large bristles on the vertex, and rather behind the upper inner corner of the eye.
ova
pl. of ovum.
oval
adj. [L. ovum, egg] Egg-shaped.
ovarial ligament
(ARTHROPODA: Insecta) A ligamentous strand attaching the terminal filaments of an ovary to the dorsal diaphram or body wall, or may be from the opposite side by way of a ...
ovarian balls
(ACANTHOCEPHALA) In females, a central mass found in the dorsal ligament sac or free in the pseudocoelom from which oogonia are differentiated; free floating ovaries.
ovarian tube
(ARTHROPODA: Insecta) The tubular part of an ovariole containing the germ cells, oocytes, nurse cells, and follicle cells.
ovariole
n. [L. dim. ovum, egg] (ARTHROPODA: Insecta) The tubular division of a female ovary where the oocytes develop.
ovariotestis
see ovotestis.
ovarium
see ovary.
ovary
n. [L. ovum, egg] The female gonad of animals in which the egg cells are developed; ovarial, ovarian adj..
ovate
adj. (L. ovum, egg] Egg-shaped; oval.
ovate-oblong
Between oval and oblong.
ovate-subquadrate
Rounded, but somewhat four-sided.
ovately-conic
Formed like an egg with a somewhat conic apex.
ovejector
see ovijector.
overdispersion
An ecological term referring to nonrandom dispersion of individuals in a habitat; as, when a minority of individual hosts bear the majority of parasites.
ovicapt
n. [L. ovum, egg; captus, capture] (PLATYHELMINTHES: Cestoda) A sphincter on the oviduct.
ovicell
n. [L. ovum, egg; cella, cell] (BRYOZOA) 1. In Gymnolaemata, marine Cheilostomata with a modified zooecium serving as a brood pouch. 2. In Stenolaemata, a gonozooid; an ...
oviducal gland
(MOLLUSCA: Cephalopoda) A glandular complex on each oviduct involved in egg coat formation; in some octopods, a sperm storage area.
oviduct
n. [L. ovum, egg; ducere, to lead] Ducts or passages carrying female gametes from the ovary toward the exterior; a gonoduct; oviducal adj..
oviferous
see ovigerous.
oviform
adj. [L. ovum, egg; forma, shape] Egg-like in shape.
oviger
n. [L. ovum, egg; gerere, to bear] (ARTHROPODA: Chelicerata) In some Pycnogonida, specialized egg carrying appendages, as well as functioning in cleaning the long legs and ...
ovigerous
adj. [L. ovum, egg; gerere, to bear] Carrying eggs; oviferous.
ovigerous frena
(ARTHROPODA: Crustacea) In Lepadomorpha Cirripedia, a fleshy ridge or lap on the inner surface of the mantle anchoring the egg masses.
ovigerous lamella
(ARTHROPODA: Crustacea) In Lepadomorpha Cirripedia, the egg masses forming one or more lamellae within the cavity; see ovigerous frena.
ovijector
n. [L. ovum, egg; jacere, to throw] (NEMATA) A muscular development of the vagina uterina that aids in the passage of eggs.
oviparous
adj. [L. ovum, egg; parere, to bring forth] Egg-laying.
oviporus
n. [L. ovum, egg; porus, passage] (ARTHROPODA: Insecta) In Lepidoptera, the reproductive opening on segment 9 that serves for the discharge of eggs.
oviposit
v. [L. ovum, egg; ponere, to place] To lay or deposit eggs.
oviposition
n. [L. ovum, egg; ponere, to place] The act of depositing eggs.
ovipositor
n. [L. ovum, egg; ponere, to place] Structure on a female animal modified for deposition of eggs.
ovisac
n. [L. ovum, egg; saccus, bag] 1. An egg capsule, brood pouch, or receptacle. 2. (ARTHROPODA: Crustacea) In female Copepoda, the external sac attached to the somite ...
oviscapt
См. oviscapte.
oviscapte
n. [L. ovum, egg; captare, to conduct] An ovipositor.
ovivalvula
n. [L. ovum, egg; dim. valva, leaf of a folding door] (ARTHROPODA: Insecta) In female Heteroptera and Ephemeroptera, a subgenital plate.
ovocyte
see oocytes.
ovogonium
see oogonium.
ovoid
adj. [L. ovum, egg; Gr. eidos, form] Egg-shaped; ovate.
ovotestis
n.; pl. -testes [L. ovum, egg; testis, testicle] Hermaphroditic reproductive gland; an organ that produces both spermatozoa and ova at the same or at different periods of the ...
ovovitellarium
n. [L. ovum, egg; vitellus, yolk] (PLATYHELMINTHES: Cestoda) A combined mass of ova and vitelline cells.
ovoviviparous
adj. [L. ovum, egg; vivus, alive; parere, to bring forth] Producing eggs that are incubated and hatched within the female\'s body; see oviparous, viviparous.
ovum
n.; pl. ova [L. ovum, egg] The egg cell.
oxea
n. [Gr. oxys, sharp] (PORIFERA) A smooth spicule tapering to two similarly pointed ends; amphioxea.
oxyaster
n. [Gr. oxys, sharp; aster, star] (PORIFERA) A starshaped spicule with a small center and pointed rays.
oxydiact
adj. [Gr. oxys, sharp; di-, two; aktis, ray] (PORIFERA) Having three rays with two fully developed.
oxygnathous
adj. [Gr. oxys, sharp; gnathos, jaw] Having sharp jaws.
oxyphil
См. oxyphile.
oxyphile
see oxyphilic.
oxyphilic
См. oxyphilous.
oxyphilous
adj. [Gr. oxys, sharp; philein, to love] 1. Tolerant of acid. 2. Staining readily in an acid stain.
oxyphobe
См. oxyphobic.
oxyphobic
adj. [Gr. oxys, sharp; phobos, fright] Not tolerant of acid soils; acidophobic.
oxytylote
n. [Gr. oxys, sharp; tylos, knob] (PORIFERA) A slender straight sponge spicule, sharp at one end and knobbed at the other.
ozadene
n. [Gr. ozein, to smell; aden, gland] (ARTHROPODA: Diplopoda) A defense gland, secreting a repugnant or poisonous chemical.
ozopore
n. [Gr. ozein, to smell; L. porus, pore] (ARTHROPODA: Diplopoda) The opening of the ozadene.
P 1
In Mendel\'s laws, the first parental generation; parents of a given individual of the F 1 generation.
pachynema
n. [Gr. pachys, thick; nema, thread] Thickened, paired chromosomes of meiosis prophase I, third stage; sometimes used as a synonym of pachytene.
pachyodont
adj. [Gr. pachys, thick; odous, tooth] (MOLLUSCA: Bivalvia) With heavy, blunt, amorphous teeth.
pachytene
n. [Gr. pachys, thick; tainia, ribbon] A prophase I stage in meiosis in which the chromosomes are thickened and paired and crossing over occurs; see pachynema.

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