G

Galea. - The outer portion of the endopodite. (L. galea, a helmet.) See Lobus Superior.

Galeate. - Situated on the dorsal side of the maxillæ. (L. galea.) See Endopodite.

Galla. - A plant gall. (L. galla, a gall.)

Galls. - Morbid enlargements of the affected parts of a plant, due to parasitic agency. They vary enormously in form and colour. (L. galla, a gall-nut.)

Gangliform, Ganglioform. - Having the form of ganglion. (L. ganglion and forma.)

Ganglion. - A nerve centre; a healthy enlargement of a nerve. (L.)

Ganglion of Median nerve. - [See Median nerve.]

Ganglion ventriculare. - The unpaired ganglion, situated in front of the proventriculus. The number of these ganglia varies in different orders of insects.

Ganglionic Plate. - The Periopticon.

Gasterotheca. - The abdomen-case, that portion of the theca enclosing the abdomen. (Gr. gaster, the belly, and theca, a case.)

Gastric. - Belonging to the stomach. (Gr. gaster.)

Gastro-ileal folds. - Twelve “dark spots” lying at the anterior end of the ileum; the boundary separating the intestine from the chylific stomach, and forming a peculiar valve. (Minot.) (From Gr. gaster, ileo, and Dan. folde.)

Gastrula. - The stage of the egg formed by the presence of the primitive streak, the invaginated blastoderm, the ectoderm and the endoblast. (From Gr. gaster.)

Gastrula stage. - (Embryology.) The stage of embryology, when the primitive streak invaginates to allow of the formation of the inner layer. (Gr. gaster.)

Geminate. - Arranged in pairs; twin; disposed in pairs from the same point. (L. geminus, twin.)

Geminous. - When spots, tubercles, puncta, etc., are geminate. (L. geminus.)

Gemmiparous. - Asexual generation of new individuals, arising as buds from the body of the parent. (L. geminus, and pario, to bring forth.)

Gena. - The cheek, the lateral part of the head just below the eyes. (L.)

Geniculate. - Elbowed, or kneed; having the joint a little bent. (L. genu, the knee.)

Genital. - Pertaining to the genitalia. (L. genitalia.) [PM]

Genitalia. - The extended organs of reproduction. (L. genitalis, genitals.)

Geometræ. - Larvæ which alternately elevate and straighten the middle of the body when walking, as those constituting the genus Geometra; opposed to Rectigrade. (L. geometra, a land measurer.)

Germarium. - The terminal portion of the ovariole. (F. germe, a young shoot, a sprout, from L. germen.)

Germinal vesicle. - The female pronucleus containing the germinal spot. (L. germino, germinate, and versicula, a vesicle.)

Gestation. - The period during which the female is maturing the ova or embryos. (L. gesto, to carry.)

Gibbose, Gibbous. - Hump-backed, very convex. A term applied to the surface when it presents one or more large elevations. (L. gibbus, a hump.)

Gills. - (Scand.) M.E. gille. - Dan. giælle, Swed. gal, a gill.) See Tracheal gills.

Ginglymus. - Hinge-like articulation; hinges. (Gr. ginglymus, a mortice-joint.)

Gizzard. - The proventriculus, the muscular stomach designed for crushing the food. (F. - L.) M.E. giser (the d being added). - O.F. gegier, jugier, juisier. (F. gésier). - L. gigerium, only in pl. gigeria. (Late L. gizeria), cooked entrails of poultry. The Stomach. See Stomach and Proventriculus.

Glabrate. - Brilliantly glossy. (From L. glaber, smooth.)

Glabrous. - Smooth, hairless, and without punctures and sculpture. (From L. glaber.)

Glassotheca. - The proboscis-case; that portion of the theca enclosing the protruding proboscis often seen in the pupæ of Lepidoptera; the tongue-case. (A.S. glæs, and Gr. theca, a case.)

Glaucous. - Grey; bluish-green; resembling the colour of the sea. (L. glaucus, grey; blue; sea-green.)

Globate, Globose. - (Egg.) Perfectly globose, round in all directions; spherical. (L. globus, sphere, ball, etc.)

Glochis. - A barbed point. (Gr.)

Glossæ. - The first lobes of the second maxillæ or labium. (Taken from L. glossa, a word needing explanation; from Gr. the tongue; the root is uncertain.)

Gonapophyses. - Processes situated in the genital pouch of the female insect, which act as forceps for grasping the egg-capsule. (From Gr. gone, seed, physis, a genital power.)

Gonytheca. - The knee-pan; a cavity situated on the underside of the apex of the thigh, to receive the base of the tibia. (Probably from the Idg. related bases, which are genu (as in L.), gonu (as in Gr.), gneu (whence Tent. kneu), the knee, and Gr. theca, a case.)

Graminaceous. - Having the colour of grass. (L. gramen, grass.)

Graminivorus. - Subsisting on grass, or vegetable food. (L. gramen, and voro, to eat.)

Granule. - A very minute elevation. (L. granulus.)

Granular, Granulate. - With small rounded-off elevations. (From L. granulus.)

Gressorial. - Adapted for walking. (L. modified L. gressioius, from L. gressus, stepping.)

Grinding teeth. - See Dentes molares. (E.) A.S. grindan, past tense grand, pa. par. grunden. Allied to L. frendere, to gnash; and L. dens, a tooth.)

Griseus. - Of a grey colour; grizzled. (Fr. gris, gray.)

Grossus. - Large, great in size, or bulk; wide; extensive; abundant; ample. (Fr. gros, from L. crassus, thick.)

Guarded. - (Pupæ.) See Pupæ custodiatæ. (From Fr. garder, and ward.)

Gula. - The underside of the skull. The throat. (L. gula, the throat.)

Gular. - Pertaining to the throat. (L. gula.)

Gullet. - The œsophagus, that part of the alimentary canal which approaches the head, and the external opening of which is the throat, or pharynx. See Ventricosus, Compositus, and Simple. (L. gula, the throat.)

Gustatory nerves. - Two thread-like nerves projecting from the anterior border of the subœsophageal ganglion, which innervate the region of the salivary glands. (Krausse.) (L. gusto, to taste.)

Gutta. - A light spot upon a light ground, viz., white upon yellow; a roundish dot of colour, intermediate in size between an atom and a macula. (L. gutta, a spot.)

Guttate. - Possessing guttæ; painted with guttæ. (L. gutta.)

Gymnopteræ. - Membranaceous and transparent wings without scales. (Gr. gymno, naked, and pteron, a wing.)

Gyri cerebrales. - (Gr. gyros, a ring; and cerebrum.) See Calyces.


Original text Copyright © 1914 Nigel K. Jardine.
HTML mark-up and links Copyright © 2003 Peter Miller
This page was last changed 08-Sep-2003.
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