Ensiform: sword-shaped: two-edged, large at base and tapering to the point: see anceps.

Entad: extending inwardly from without.

Ental: referring to the centre of the body cavity.

Enteric: relating to the digestive ca.n.a.l or enteron.

Enteron: the digestive ca.n.a.l as a whole; a general term.

Entire: with an even unbroken margin: said of wings when they are not divided or cut into.

Entoderm: the innermost germ layer of the embryo, from which are derived the epithelium of the alimentary ca.n.a.l and accessory structures: = endoderm and hypoblast.

Entognathous: see entotrophous.

Entoloma: the inner margin of the wings.

Entomogenous: growing in or on an insect: e.g. fungi.

Entomography: the description of an insect or of its life history.

Entomolin: = chitin, q.v.

Entomologist: one who collects and studies insects.

Entomology: that branch of Zoology that deals with insects and, specifically, the Hexapods.

Entomophagous: feeding upon insects: specifically applied to those wasps that feed their young with larvae, etc.

Entomophilous: insect-loving: applied to plants especially adapted for pollination by insects.

Entomophytous: referring to plants produced in or on an insect: see Entomogenous.

Entomosis: a disease caused by a parasitic insect.

Entomotaxy: the preservation and preparation of insects for study.

Entomotomy: that science which deals with internal structure of insects.

Entomotomist: a student of insect structure.

Entosternum: the internal processes from the sternum.

Entothorax: applied to the apodemes or processes extending inwardly from the sternal sclerites: see apophysis.

Entotrophous: with the mouth parts buried in the head:= entognathous: see ectotrophous.

Entozoa: those animals that live within the body of others.

Environment: the sum of the influences surrounding or acting upon an organism.

Enzyme: a ferment secreted by a cell or a gland.

Epalpate: having no palpi.

Ephebic: referring to the winged, adult stage.

Ephemerida: May-flies: an ordinal term used for insects with net-veined wings, held vertically when at rest, not folded; mouth mandibulate, not functionally developed: thorax loosely agglutinated; abdomen with a.n.a.l filaments: metamorphosis incomplete.

Ephemeroptera: briefly winged: = ephemerida; q.v.

Epiblast: the outer germ layer of the embryo.

Epicranial: relating or pertaining to the epicranium.

Epicranial lobe: in caterpillars, the lateral, superior convex lobe of the head.

Epicranial plate: in some larvae a plate-like structure forming the epicranium.

Epicranial suture: the line of junction of the two procephalic lobes.

Epicranium: the upper part of the head from the front to the neck: often used to include front, vertex and genae:= calva.

Epideme: see articulatory epideme.

Epiderma -is: the cellular layer of the skin, underlying and secreting the cuticula: incorrectly applied to the outer skin or cuticle.

Epidermata: abnormal excrescences or outgrowths from the skin.

Epididymis: the convoluted efferent ducts, ma.s.sed at the posterior part of the testes.

Epigastrium: the first entire ventral sclerite of the abdomen.

Epigenesis: the doctrine of growth from an undifferentiated germ, as opposed to preformation, which implies development from already existing rudiments.

Epigenetic: the period after the union of the male and female elements, during which organs are forming.

Epiglossa: = epipharynx; q.v.

Epiglottis: = epipharynx; q.v.

Epilabrum: a sclerite at each side of the labrum: specifically applied in myriapods.

Epilobe: of mentum in Carabidae, really corresponds to a partially divided ligula: a lateral appendage of a bilobed mentum.

Epimera -eron: the posterior lateral thoracic sclerites; usually small, narrow or triangular.

Epiopticon: the second ganglionic swelling of the optic tract: see opticon.