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Слова на букву frin-helm (732)

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fringe scale
(ARTHROPODA: Insecta) Any scale in the wing fringe.
fringed plates
see pectinae.
see articular pan.
adj. [L. frondis, of leaves] More or less divided into leaf-like expansions, as certain mollusks or bryozoans.
n.; pl. frontes [L. frons, fore part of anything, face] 1. (ARTHROPODA: Insecta) The head sclerite bounded by the postfrontal suture dorsally and the epistomal suture ...
n. [L. frons, fore part of anything, face] 1. The forehead; face. 2. (ARTHROPODA: Crustacea) In Decapoda, that part of a brachyuran carapace between the orbits. 3. ...
adj. [L. frons, fore part of anything, face] 1. Of or pertaining to the front or forehead. 2. (BRYOZOA) Pertaining to the exposed or orifice-bearing sides of the zooecial ...
frontal appendages
(ARTHROPODA: Crustacea) In Anostraca, paired filaments arising from the bases of the antennae, but independent of them.
frontal area
(ARTHROPODA: Insecta) The small median triangular plate of ants, on the anterior surface of the head, just above the clypeus.
frontal band
(ARTHROPODA: Crustacea) A glandular adhesion organ of parasitic copepods, in the frontal region, used for attachment to the host.
frontal bristles
(ARTHROPODA: Insecta) In Diptera, a row of bristles on each side of the boundry between the median, frontal vitta or plate and the eye orbit.
frontal budding
(BRYOZOA: Gymnolaemata) Buds arising from the frontal wall or associated structure.
frontal carina
(ARTHROPODA: Insecta) A carina, or ridge, forming the medial boundary of the antennal fossa.
frontal closure
(BRYOZOA: Gymnolaemata) In Cheilostomata, calcified frontal and oral walls which were membranous in the autozooid originally.
frontal condyle
(ARTHROPODA: Insecta) A process of the frons that articulates with the dorsal fossa of the mandible.
frontal costa
(ARTHROPODA: Insecta) In Orthoptera, a prominent vertical ridge of the head; a carina.
frontal crest
(ARTHROPODA: Insecta) In Hymenoptera, an elevation extending across the head above the antennal sockets.
frontal dilators of the pharynx
(ARTHROPODA: Insecta) The muscles which run from the frons to the pharynx.
frontal disc
(ARTHROPODA: Insecta) In larval Diptera, a projecting histoblast upon which develops the rudiment of an antenna.
frontal eye
see frontal organ.
frontal eye complex
(ARTHROPODA: Crustacea) The eyes or reduced eyes innervated from the nauplius eye center; see organ of Bellonci, frontal organ.
frontal fissure
(ARTHROPODA: Insecta) In Diptera, the line extending from the crescent-shaped sclerite above the antennae to the border of the mouth.
frontal ganglion
(ARTHROPODA: Insecta) The median ganglion above the esophagus, in front of the brain, connected by nerves to the tritocerebral lobe on either side.
frontal gland
(ARTHROPODA: Insecta) In Isoptera, a large median gland beneath the integument of the head in certain soldier- termites, opening through the fontanelle or frontal pore, ...
frontal lobes
(ARTHROPODA: Insecta) 1. In Psyllidae, two lobes or protrusions divided by a suture in which an ocellus is situated. 2. In Formicoidea, lateral projection of the frontal ...
frontal lunule
(ARTHROPODA: Insecta) In Diptera, the lunar-shaped sclerite above the base of the antennae and below the frontal suture.
frontal membrane
(BRYOZOA: Gymnolaemata) In Cheilostomata, membrane of the frontal wall in autozooids.
frontal orbit
see facial orbit.
frontal orbits
see genovertical plates.
frontal organ
(ARTHROPODA: Crustacea) a. Sensory cells on the anterior surface of the cephalon of malacostracans; the haft organ or frontal eye in non-malacostracans. b. The Bellonci ...
frontal pits
См. pretentorial pits.
frontal plane
A plane or section parallel to the body main axis and at right angles to the sagittal plane; horizontal plane.
frontal plate
(ARTHROPODA: Crustacea) In brachyuran Decapoda, a modified rostrum with a downward projecting process united with the epistome.
frontal plate of the tentorium
(ARTHROPODA: Insecta) The plate formed by fused anterior arms of the tentorium.
frontal pore
see fontanelle.
frontal region
(ARTHROPODA: Crustacea) The anteromedian part of a carapace including the rostrum and the region behind it.
frontal ridge
(ARTHROPODA: Insecta) 1. An anteriorly directed ridge on the dorsal margin of the eye. 2. For mosquitoes, see postfrontal ridge.
frontal sail
(MOLLUSCA: Gastropoda) In Prosobranchia, an erect transverse fold on the anterior part of the head which may be simple or formed into scallops, tubercles, or projections.
frontal seta
1. (ARTHROPODA: Diplopoda) One of a pair of setae on either side of the median line of the frontal surface of the head. 2. (ARTHROPODA: Insecta) One of two setae on the ...
frontal shield
(BRYOZOA: Gymnolaemata) In Cheilostomata, the skeletal structure of the frontal or body wall that supports and protects the retracted organs of an autozooid.
frontal stripe
(ARTHROPODA: Insecta) In Diptera, a membranous or discolored area on the middle front.
frontal suture
(ARTHROPODA: Insecta) 1. One of two sutures arising at the anterior end of the coronal suture which extends ventrad toward the epistomal suture. 2. In Diptera, a suture ...
frontal tentacles
(MOLLUSCA: Gastropoda) In Opisthobranchia, tentacles just posterior to the mouth; cephalic tentacles.
frontal triangle
(ARTHROPODA: Insecta) In holoptic flies, the triangle between the eyes and the antennae, the apex being above.
frontal tuft
(ARTHROPODA: Insecta) In Hymenoptera, a group of elongate simple setae and fusiform scales arising at the interocular space and the adjacent portion of the vertex.
frontal vesicle
(ARTHROPODA: Insecta) In Odonata, a protuberance between the compound eyes, bearing the ocelli.
frontal vitta
(ARTHROPODA: Insecta) In Diptera, an area on the head between the antennae and the ocelli; the frontalia.
frontal wall
(BRYOZOA) An external wall supporting the oral wall wholly or partly.
n. [L. frons, front] 1. (ARTHROPODA: Insecta) For Diptera, see frontal vitta. 2. (GNATHOSTOMULIDA) Paired sensory bristles on the anterior part of the head.
fronto-orbital bristles
(ARTHROPODA: Insecta) In Diptera, bristles on the front, next to the eyes.
frontoclypeal area
(ARTHROPODA: Insecta) The front of the head, that is divided by the epistomal sulcus (or suture) into the frons above and the clypeus below.
frontoclypeal sulcus or suture
see epistomal suture.
n. [L. frons, forehead; clypeus, shield] (ARTHROPODA: Insecta) The line (sulcus or suture) between the combined clypeus and frons which is not externally visible.
frontogenal suture
(ARTHROPODA: Insecta) A more or less vertical suture on the front of the head, between the frons and the gena; see subantennal suture.
frontolateral horn
(ARTHROPODA: Crustacea) In Cirripedia nauplii, a pair of tubular frontolateral extensions of cuticle.
froth glands
(ARTHROPODA: Insecta) In nymphal Cercopidae, the modified Malpighian tubules.
adj. [L. frux, fruit; vorare, to devour] Feeding upon fruit.
n.; sing. & pl. [ME. fry, offspring] 1. Young or offspring. 2. The recently hatched brood of oysters.
adj. [L. fugere, to flee] Having a tendency to disappear; not permanent; perishing early; lasting a short while.
adv.; fugaciousness n.
adj. [L. fulcrum, support] Of or pertaining to a fulcrum.
fulcral plates
(ARTHROPODA: Insecta) In aculeate Hymenoptera, see triangular plates; for Diptera see clypeal phragma.
fulcrant trochanter
(ARTHROPODA: Insecta) A trochantin traversing the femur, but not intervening between it and the coxa.
fulcrate mastax
(ROTIFERA) A mastax with an elongate fulcrum, having a pair of leaf-like manubria attached anteriorly.
fulcro-cranial muscle
(ARTHROPODA: Insecta) 1. A muscle arising from the postoccipital phragma or ridge and inserted on the fulcrum in the thysanuran Lepismodes and mayfly nymphs. 2. In the ...
n.; pl. fulcrums [L. fulcrum, support] 1. Any structure that props or supports another. 2. (ARTHROPODA: Insecta) a. In Heteroptera, the trochantin. b. In lower ...
adj. [L. fulgidus, shining] Appearing red with bright metallic reflections.
n. [L. fulgurare, to flash] The act of flashing as lightning; to emit flashes.
adj. [LL. fuligo, soot] Of or pertaining to soot or smoke; having the color of soot; dark colored, sooty opaque brown.
n. [L. dim. fultura, prop] (ARTHROPODA: Insecta) In Diptera, the aedeagal apodeme of male Tephritidae possessing a pair of lateral processes extending to the hypandrium.
adj. [L. dim. fultura, prop; forma, shape] (ARTHROPODA: Insecta) Having the fultella at least partially fused with the median internal surface of the hypandrium.
n.; pl. -ae [L. fultura, prop] (ARTHROPODA: Insecta) In male Lepidoptera, a rectangular sclerite (paired) extending into the abdomen from sternite 9; see suspensorium.
fultura inferior
(ARTHROPODA: Insecta) In male Lepidoptera, sclerotized structures situated on the ventral diaphragm, including the ventral part of the anellus and juxta.
fultura penis
(ARTHROPODA: Insecta) In male Lepidoptera, the sclerotized structures of the diaphragm, namely, the fultura inferior and the fultura superior.
fultura superior
(ARTHROPODA: Insecta) In male Lepidoptera, sclerotized structures situated on the dorsal part of the diaphragm, including the dorsal part of the anellus and transtilla.
fulturae of hypopharynx
(ARTHROPODA: Chilopoda) Two ventral plates posteriorly attached to the margin of the cranium, and mesally extended forward as a tapering arm against the side of the ...
adj. [L. fulvus, tawny yellow] Having low saturation and median brilliance; orange, reddish yellow, tawny, rust color or reddish brown.
v. [L. functio, perform] The activity or action of any part of an organism; functional adj..
functional haplometrosis
(ARTHROPODA: Insecta) A colony in which an initial pleometrotic association of females undergoes a change, resulting in a haplometrotic society of the original females, ...
n. [L. fundamentum, foundation] The primordium.
n. [L. fundare, to found; Gr. genos, descent] (ARTHROPODA: Insecta) In Homoptera, the wingless, viviparous parthenogenetic Aphidae and Phylloxeridae females, the offspring ...
n.; pl. -trices [L. fundare, to found] (ARTHROPODA: Insecta) The wingless, viviparous, parthenogenetic female Aphidae, Phylloxeridae and Adelgidae that hatches from ...
fundatrix spuria
see agamic, migrante.
n. [L. fundus, bottom] The base or bottom, as in the bottom of a hollow organ.
adj. [L. fungus, mushroom; colare, to inhabit] Living in or on fungi.
adj. [L. fungus, mushroom; forma, shape] Mushroomshaped.
adj. [L. fungus, mushroom; vorare, to devour] Feeding on or devouring fungus mycelium; mycetophagous; mycophagous.
fungus garden
Fungi cultivated within the nest of higher termites or fungus ants for use as food; see ambrosia, beebread.
fungus-growing beetle
(ARTHROPODA: Insecta) Any beetle that feeds on symbiotic fungi, i.e., ambrosia beetles, etc.
n.; pl. -li [L. funiculus, little cord] 1. (ARTHROPODA: Insecta) a. The middle antennal segments between the scape and the club. b. The main tendon of the abdomen. c. In ...
funicular strand
(BRYOZOA: Gymnolaemata) Tissue crossing all body cavities; in males and hermaphrodites produces sperm.
adj. [L. funiculus, little cord] Having or forming a funiculus.
См. funicle.
n. [L. infundibulum, funnel] 1. (ANNELIDA: Oligochaeta) Internal opening of both male and female genital ducts; see female and male funnel,. 2. (ARTHROPODA: Insecta) See ...
funnel organ
(MOLLUSCA: Cephalopoda) A glandular structure on the dorsal side of the funnel, slightly behind the valve; Verrill\'s organ.
funnel shaped
see infundibulum.
n.; pl. -cae [L. furca, fork] 1. Any forked process. 2. (ARTHROPODA: Crustacea) The caudal furca; cercopod. 3. (ARTHROPODA: Insecta) a. The cercopods; the forked sternal ...
furcae maxillares
see superlinguae.
furcal arms
see sternal apophyses.
furcal ramus
see caudal ramus.
see pectina.
furcasternal suture
(ARTHROPODA: Insecta) In pterygote insects, the internal median longitudinal line formed at the point of meeting the mesopleurosternal ridges of opposite sides and ...
n. [L. furca, fork; sternum, breast] (ARTHROPODA: Insecta) 1. In apterygote insects, that area of the thoracic sternum separated from the basisternum by the ...
adj. [L. furca, fork] Forked; having two divergent branches from a common base.
furcate plates
see pectina.
see spina.
n. [L. dim. furca, fork] (ARTHROPODA: Crustacea) In Euphausiacea, the larval stage following the calyptopis (mysis type) with stalked and movable compound eyes and with ...
n. [L. dim. furca, fork] (ARTHROPODA: Insecta) The outer surface of the sternum bearing an invaginated furca; see furcasternal suture.
furcocercous cercariae
(PLATYHELMINTHES: Trematoda) Cercariae with forked tails into which the body is not retractable; divided into several groups:. 1. Bucephalus group (including ...
n.; pl. -lae [L. dim. furca, fork] (ARTHROPODA: Insecta) 1. The forked springing apparatus of springtails; furca. 2. In Hymenoptera, a small sclerite of the anterior ...
adj. [L. dim. furca, fork] Having a furcula.
n. [A.S. furh, trench] A groove separating parts, divisions or segments of an invertebrate body.
furrow spines
(ECHINODERMATA: Asteroidea) Spines on the adambulacral plates that protect the ambulacral furrow.
adj. [L. fuscus, dusky] Having a dusky or somber hue.
adj. [L. fuscus, dsky] Brown or grayish black; dusky.
adj. [L. fundere, to pour] Pertaining to being united, blended or run together.
fused phobal mass
(ARTHROPODA: Insecta) In certain scarabaeoid larvae, the large, coalesced group of phobae located on each side of the pedium, slightly anterior to the tormae.
fused-wall colony
see fixed-wall colony.
adj. [L. fusus, spindle; forma, shape] 1. Spindleshaped, tapering almost equally toward both ends. 2. (MOLLUSCA: Gastropoda) Of or pertaining to univalves having a long ...
n. [L. fusus, spindle] A joining together of adjacent structures, parts or sclerites.
fusion layer
(MOLLUSCA: Bivalvia) That part of the ligament secreted by the mantle.
adj. [L. fusus, spindle] Spindle-shaped; fusiform.
См. fusules.
n. pl. [L. dim. fusus, spindle] (ARTHROPODA) Minute upright cylinders with a tapering spine on the base of the spinnerets; the spinning tubes of the silk glands in various ...
fusus amphidialis
see sensilla pouch.
n. [L. galea, helmet] 1. (ARTHROPODA: Chelicerata) A moveable process on the digit of the chelicera of pseudoscorpions, used to spin silken cocoons for protection during ...
galea palpiformis
(ARTHROPODA: Insecta) The galea composed of cylindrical joints as distinguished from the lacinia.
n.; pl. -leries [ML. galilaea, gallery] A passage or corridor made by an animal.
n. [L. galla, gall; colere, to inhabit] (ARTHROPODA: Insecta) Form of phylloxeran fundatrix that forms leaf galls.
gallicolae migrantes
(ARTHROPODA: Insecta) Winged gall-making form of Phylloxeridae or Adelgidae that migrate to an intermediate host.
gallicolae nonmigrantes
(ARTHROPODA: Insecta) Apterous Adelgidae that remain on the primary host and produce fundatrices parthenogenetically.
adj. [L. galla, gall; colere, to inhabit] Producers or inquilines dwelling in plant galls.
adj. [L. galla, gall; Gr. phagein, to eat] Feeding upon galls or gall tissue.
n. [Luigi Galvani, pert. electricity; Gr. taxis, arrangement] A taxis in which an electric current is the directive factor.
n. [Luigi Galvani, pert. electricity; Gr. tropein, to turn] Tropism in which an electric current is the orienting factor; electrotropism.
n. [Gr. gamete, wife; dim. angos, vessel] The union of gametangia.
n.; pl. -ia [Gr. gamete, wife; angos, vessel] A structure producing gametes.
n. [Gr. gamete, wife] A cell that unites with another cell in sexual reproduction.
n. [Gr. gamete, wife; kytos, container] 1. A spermatocyte or oocyte. 2. Sexual stage of the malarial parasite in the blood which upon being taken into the mosquito host ...
n. [Gr. gamete, wife; gamos, marriage] Union of two single celled gametes to form the zygote.
n [Gr. gamete, wife; genesis, beginning] Gamete formation by which oogonia become ova and spermatogonia become sperm; gametogeny; gonogenesis; see oogenesis; ...
gametogenetic generation
A sexual generation as opposed to a parthenogenetic generation.
see gametogenesis.
see gametocyte.
n. [Gr. gamete, wife; gonos, seed] A phase in the development cycle of the malarial parasite in the red blood cells of man in which the two sexes of gametocytes are ...
n. [Gr. gamete, wife; tokos, birth] Parthenogenesis in which unfertilized eggs develop into either sex; deuterotoky; amphitoky; arrhenotoky.
gamma taxonomy
Taxonomy that uses all available biological information ranging from intraspecific population studies to the study of speciation, evolutionary rates and trends; ...
n. [Gr. gamos, marriage; bios, life] The sexual generation in alternation of generations; see agamobium.
n. [Gr. gamos, marriage; demos, people] An isolated inbreeding community.
n. [Gr. gamos, marriage; genesis, beginning] Sexual reproduction; gamogonic a; see agamogenesis.
see gamogenesis.
n. [Gr. gamos, marriage; -one, mimics ending of hormone] A group of biological agents that cause initiation of fertilization.
see haplophase.
ganglia allata
see corpora allata.
n.; pl. -glia [Gr. ganglion, swelling] A discrete group of nerve cell bodies acting as a center of nervous influence.
ganglion ventriculare
(ARTHROPODA: Insecta) The ganglion in front of the proventriculus.
ganglionic center
Where two or more ganglia of adjoining segments coalesce.
ganglionic commissure
A nerve cord connecting any two adjacent ganglia.
ganglionic layer
see lamina.
ganglionic plate
see lamina.
n. [ON. gap] 1. Discontinuity. 2. A narrow unstained region in a chromosome representing chromosome structural changes caused by mutagens.
adj. [ON. gapa, yawn, gape] 1. An invertebrate that gapes. 2. (MOLLUSCA: Bivalvia) In oysters, used to denote a dead or dying individual with gaping valves and some ...
adj. [ON. gapa, yawn, gape] (MOLLUSCA: Bivalvia) Pertaining to an opening along the margin of a shell that does not naturally shut tightly together, i.e., soft shelled clams; ...
gas gland
(CNIDARIA: Hydrozoa) In Siphonophora, glandular epithelium that secretes an air-like gas into a float.
gaseous exchange
The exchange of gases between an organism and its environment.
gaseous plastron
see plastron.
n. [Gr. gaster, stomach] 1. Stomach. 2. (ARTHROPODA: Insecta) The major part of the abdomen behind the pedicel in threadwaisted Hymenoptera.
n. [Gr. gaster, stomach; stoma, mouth] (PLATYHELMINTHES: Trematoda) Cercaria in which the sucker is on the midventral surface.
n. [Gr. gaster, stomach; theke, case] (ARTHROPODA: Insecta) Part of the theca or pupa case surrounding the abdomen; see somatotheca.
n. [Gr. gaster, stomach] Hypothetical adult ancestor of higher animals that all have the gastrula as a common stage in their early ontogeny.
n. [Gr. gaster, stomach] The ventral side of a body.
gastral cavity
see spongocoel.
gastral groove
(ARTHROPODA: Insecta) A longitudinal furrow in the mid-line of the ventral plate of some eggs.
gastral layer or membrane
(PORIFERA) Choanocytes lining the internal cavity.
gastral ray
(PORIFERA) One of the quadriradiates embedded in the wall and projecting into the central gastral cavity.
n. [Gr. gaster, stomach] (PORIFERA: Hexactinellida) Microscleres beneath the inner cell layer.
mill (ARTHROPODA: Crustacea) 1. Thickened and calcified parts in the cardiac stomach lining composed of moveable articulated ossicles used to break up food. 2. In ...
gastric filament
(CNIDARIA) A filament lined with nematocysts that kill living prey entering the stomach of a jellyfish.
gastric grooves
(ARTHROPODA: Crustacea) In Stomatopoda, the longitudinal pair of grooves, extending from the base of the rostrum to the posterior margin of the carapace.
gastric ossicles
(ARTHROPODA: Crustacea) The teeth of the gastric mill.
gastric ostium
(CNIDARIA) Gastric pouch opening of jellyfish.
gastric pouch
(CNIDARIA) One of four enlargements of the stomach of a jellyfish.
gastric region
(ARTHROPODA: Crustacea) In Decapoda, the median part anterior to the cervical groove and posterior to the frontal region.
gastric shield
(MOLLUSCA: Bivalvia) A sclerotized plate that lines a part of the stomach, that aids the crystalline style by abrasion, thus releasing carbohydrate digesting enzymes.
gastric tooth
(ARTHROPODA: Crustacea) In Decapoda, a tooth on the midline of the carapace anterior to the cervical groove.
adj. [Gr. gaster, stomach; L. legere, to collect] (ARTHROPODA: Insecta) Pertaining to bearing pollen baskets beneath the abdomen.
gastro-ileal fold
(ARTHROPODA: Insecta) A circular valve-like fold separating the intestine and the chylific stomach or ventricle.
n. [Gr. gaster, stomach; koilos, hollow] The gastrulation cavity; archenteron.
n.; pl. -li [Gr. gaster, stomach; koilos, hollow] (ARTHROPODA: Insecta) In Hymenoptera, transverse impressions at both sides of the base of the 2nd gastral tergite; ...
n. [Gr. gaster, stomach; derma, skin] 1. A one cell thick lining of the digestive tract of coelenterates, ctenophors and platyhelminths. 2. Endoderm.
n. [Gr. gaster, stomach; lithos, stone] (ARTHROPODA: Crustacea) In Decapoda, a discoidal calcareous nodule, commonly found in the stomodeum.
gastroorbital carina
(ARTHROPODA: Crustacea) In Decapoda, a narrow carapace ridge extending posteriorly from the supraorbital spine; supraorbital.
gastroorbital groove
(ARTHROPODA: Crustacea) In Decapoda, a short, longitudinal carapace groove branching from the cervical groove at the level of the orbit and directed toward it.
См. gastropods.
n.; n. pl. [Gr. gaster, stomach; pous, foot] A class of asymmetrical univalve mollusks with stomach situated in the region of the foot, shell in one piece, often spirally ...
n. [Gr. gaster, stomach; poros, hole] (CNIDARIA: Hydrozoa) In Milleporina and Stylasterina, the larger pores in the coenosteum through which gastrozooids protrude.
См. gastrotrichs.
n.; n. pl. [Gr. gaster, stomach; thrix, hair] A phylum of aquatic micrometazoans that are oblong, strap-shaped to ovoid tenpin-shaped and bear locomotor cilia on the ...
gastrovascular cavity
A body cavity in which functions of both digestion and circulation occur.
gastrovascular system
The digestive-excretory system with out-pouchings and canals.
n. [Gr. gaster, stomach; zoon, animal] (CNIDARIA: Hydrozoa) In some colonial cnidarians, a hydroid modified for feeding and digestion, also called siphons; in most ...
n. [Gr. dim. gaster, stomach] Embryonic stage resembling a sac with an outer layer of epiblastic cells (ectoderm) and an inner layer of hypoblastic cells (endoderm and ...
gathering hairs
(ARTHROPODA: Insecta) The small hairs covering the glossa and the fringe of stouter bristles on the labellum of bees.
Gause's rule
see competitive exclusion.
adj. [L. gelatus, congealed; genos, origin] Producing gelatin.
См. gelatine.
n. [L. gelatus, congealed] A jelly-like substance (gel) obtained from animal tissue; also loosely applied to secretions of animals.
gelatinous matrix
An external glandular substance secreted by some invertebrates, into which the eggs are embedded or deposited.
adj. [L. geminus, two-fold] To double; occurring in pairs; twins.
n.; pl. -mae [L. gemma, bud] A bud or bud-like organic growth.
n. [L. gemma, bud] 1. The act of reproducing by budding. 2. Marked with bright colored spots; gemmate adj..
n., pl. gemmipares [L. gemma, bud; parere, to beget] A form of asexual reproduction where animals reproduce by budding, as hydroids, bryozoans and sponges.
n. [L. gemma, bud] 1. A bud-like outgrowth that becomes an independent individual. 2. (PORIFERA) Composed of a mass of archaeocytes charged with reserves and enclosed in a ...
n. [L. gemma, bud; stasis, standing] (PORIFERA) An inhibitor of gemmule germination.
n.; pl. genae [L. gena, cheek] (ARTHROPODA: Insecta) 1. That part of an insect head on each side below the eyes, bordered by the frontal suture, and behind the eyes, by the ...
see wax glands.
genal bristles
(ARTHROPODA: Insecta) In Diptera, bristles on the genal groove at the lower corner of the eye.
genal carina
(ARTHROPODA: Insecta) In ichneumonid Hymenoptera, the lower end of the occipital carina, ending at the oral carina or the lower mandibular socket.
genal comb
(ARTHROPODA: Insecta) In Siphonaptera, a row of strong spines borne on the anteroventral border of the head; genal ctenidium; see ctenidium.
genal ctenidium
see ctenidium.
genal groove
(ARTHROPODA: Insecta) In Diptera, a depressed and groove-like area near the ventral limits of the ptilinal suture and the juncture of the gena and parafacial; cheek groove; ...
genal orbit
(ARTHROPODA: Insecta) That area of an orbit adjacent to the ventral margin of a compound eye.
n. [L. gena, cheek; pons, bridge] (ARTHROPODA: Insecta) In specialized Hymenoptera, a bridge composed of the fused postgenae that closes the underside of the head behind ...
see genital pouch.
n. [Gr. genos, birth, origin] A hereditary determiner; the unit of inheritance, carried in a chromosome that is transmitted from one generation to another in the gametes ...
gene action
Gene expression by control of specificity and rate of biosynthetic processes, particularly proteins.
gene activation
Differential expression of genes caused by deactivation, etc., of specific genes by products of the cell.
gene flow
The exchange of genetic factors between populations of the same species owing to dispersal of zygotes or gametes.
gene frequency
The percentage of all alleles at a given locus in a population represented by a specific allele.
gene interaction
Interaction between genes that produces a particular phenotype.
gene location
The distance between genes on a chromosome map.
gene locus
pl. loci The position of a gene in a chromosome.
gene map
The graphical linear arrangement of mutational sites in the gene itself.
gene mutation
Heritable change within a gene.
gene pool
The totality of the genes of a given population of sexually reproducing organisms existing at a given time.
gene splicing
see splicing.
Gene's organ
(ARTHROPODA: Chelicerata) In female Ixodida, a cephalic glandular organ which functions only during egg laying.
adj. [L. genus, kind] A comparative term used in biology in contrast to specialized or cenogenetic, indicating an ancient or long-standing character when compared with one or ...
n. [L. generare, to beget] The length of time from any given stage in the life cycle of an organism to the same stage in the offspring.
adj. [L. generare, to beget] Pertains to somatic cell generation as distinct from germ cells or gametes.
Obs; see type species.
Obs; see type species.
n. [Gr. genesis, descent; logos, discourse] The science of generation or heredity.
genetic assimilation
The fixation of a genetic character being influenced by artificial environmental changes, not evident in the original phenotype.
genetic balance
Harmonious interaction of genes ensuring normal development of the organism; genic balance.
genetic code
Genetic information that is encoded into DNA and transcribed to messenger RNA which forms peptides by genetic translation.
genetic drift
Genetic changes in isolated populations caused by random phenomena rather than by natural selection; see population, local.
genetic engineering
Manipulation of DNA from different species to form recombinant DNA including genes from both species.
genetic equilibrium
Condition of gene frequencies and genotypes in large populations that remain stable from generation to generation.
genetic homeostasis
The tendency of a population to balance its genetic composition and to resist sudden changes.
genetic isolation
Having sterility barriers preventing interbreeding between two or more populations.
genetic map
A chromosome map; relative distance between genes on a chromosome measured by crossing over and recombinations; may be recombination of genes (chromosome map) or within genes ...
genetic polymorphism
The long-term common occurrence of 2 or more genotypes in a population which cannot be accounted for by recurrent mutation.
genetic variability
Inheritable variation caused by genetic change not by environment.
n. [Gr. genesis, beginning] The science of heredity and variation.
genic balance
see genetic balance.
adj. [L. dim. genu, knee] Pertaining to the region of the knee.
n. [L. dim. genu, knee] 1. Bent; elbowed; bent in an obtuse angle. 2. (ARTHROPODA) The antenna of arthropods, i.e., insects and crustaceans. 3. (ARTHROPODA: ...
adj. [L. gignere, to beget] Pertaining to the reproductive organs or the process of generation.
genital aperture
1. The genital opening. 2. (NEMATA) When a cloaca is present, the anus.
genital area
(BRACHIOPODA) That part of the shell underlain by saccate gonocoel or posterior part of the digitate or lemniscate gonocoel.

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