Part 291

3. (Bot.) A small gland or process to which bodies are attached; as, the glandular retinacula to which the pollinia of orchids are attached, or the hooks which support the seeds in many acanthaceous plants.

Ret"i*nal (?), a. (Anat.) Of or pertaining to the retina.

Retinal purple (Physiol. Chem.), the visual purple.

Re*tin"a*lite (?), n. [Gr. &?;&?;&?;&?; resin + -lite.] (Min.) A translucent variety of serpentine, of a honey yellow or greenish yellow color, having a waxy resinlike luster.

{ Ret`in*as"phalt (?), ||Ret`in*as*phal"tum (?), } n. [Gr. &?;&?;&?;&?; resin + &?;&?;&?;&?;&?; asphalt.] (Min.) Retinite.

Ret"i*nerved` (?), a. [L. rete a net + E. nerve.] (Bot.) Having reticulated veins.

||Ret`i*ne"um (?), n.; pl. Retinea (#). [NL. See Retina.] (Zoöl.) That ||part of the eye of an invertebrate which corresponds in function with ||the retina of a vertebrate.

Re*tin"ic (?), a. [Gr. &?;&?;&?;&?; resin.] (Min. Chem.) Of or pertaining to resin; derived from resin; specifically, designating an acid found in certain fossil resins and hydrocarbons.

Ret"i*nite (?), n. [Gr.&?;&?;&?; resin: cf. F. rétinite.] (Min.) An inflammable mineral resin, usually of a yellowish brown color, found in roundish masses, sometimes with coal.

Ret`i*ni"tis (?), n. [NL., fr. NL. & E. retina + -tis.] (Med.) Inflammation of the retina.

Ret"i*noid (?), a. [Gr. &?;&?;&?; resin + -oid.] Resinlike, or resinform; resembling a resin without being such.

Ret"i*nol (?), n. [Gr. &?;&?;&?; resin + L. oleum oil.] (Chem.) A hydrocarbon oil obtained by the distillation of resin, -- used in printer's ink.

||Ret`i*noph"o*ra (?), n.; pl. Retiniphoræ (#). [NL., fr. NL. & E. ||retina + Gr. &?;&?;&?;&?; to bear.] (Zoöl.) One of group of two to ||four united cells which occupy the axial part of the ocelli, or ||ommatidia, of the eyes of invertebrates, and contain the terminal ||nerve fibrillæ. See Illust. under Ommatidium.

Ret`i*noph"o*ral (?), a. (Zoöl.) Of or pertaining to retinophoræ.

Ret`i*nos"co*py (?), n. [Retina + -scopy.] (Physiol.) The study of the retina of the eye by means of the ophthalmoscope.

Ret"i*nue (?), n. [OE. retinue, OF. retinue, fr. retenir to retain, engage, hire. See Retain.] The body of retainers who follow a prince or other distinguished person; a train of attendants; a suite.

Others of your insolent retinue.

Shak.

What followers, what retinue canst thou gain?

Milton.

To have at one's retinue, to keep or employ as a retainer; to retain. [Obs.] Chaucer.

||Re*tin"u*la (?), n.; pl. Retinulæ (#). [NL., dim. of NL. & E. ||retina.] (Zoöl.) One of the group of pigmented cells which surround ||the retinophoræ of invertebrates. See Illust. under Ommatidium.

Re*tin"u*late (?), a. (Zoöl.) Having, or characterized by, retinul&?;.

Ret`i*ped (?), n. [L. rete a net + pes, pedis, a foot: cf. F. rétinopède.] (Zoöl.) A bird having small polygonal scales covering the tarsi.

Re*tir"a*cy (?), n. Retirement; -- mostly used in a jocose or burlesque way. [U.S.] Bartlett.

What one of our great men used to call dignified retiracy.

C. A. Bristed.

Ret`i*rade" (?), n. [F.; cf. Sp. retirada retreat. See Retire.] (Fort.) A kind of retrenchment, as in the body of a bastion, which may be disputed inch by inch after the defenses are dismantled. It usually consists of two faces which make a reëntering angle.