2. (Zoöl.) One of the hard parts forming the ovipositor of insects.

(||Rhab`do*cœ"la) n. pl. [NL., fr. Gr. "ra`bdos a rod + koi^los hollow.] (Zoöl.) A suborder of Turbellaria including those that have a simple cylindrical, or saclike, stomach, without an intestine.

(Rhab`do*cœ"lous) a. (Zoöl.) Of or pertaining to the Rhabdocœla.

(Rhab*doid"al) a. See Sagittal.

(Rhab"do*lith) n. [Gr. "ra`bdos a rod + -lith.] A minute calcareous rodlike structure found both at the surface and the bottom of the ocean; — supposed by some to be a calcareous alga.

(Rhab*dol"o*gy) n. Same as Rabdology.

(Rhab"dom) n. [Gr. "ra`bdwma a bundle of rods, fr. "ra`bdos a rod.] (Zoöl.) One of numerous minute rodlike structures formed of two or more cells situated behind the retinulæ in the compound eyes of insects, etc. See Illust. under Ommatidium.

(Rhab"do*man`cy) n. Same as Rabdomancy.

(Rhab"do*mere) n. [Rhabdom + -mere.] (Zoöl.) One of the several parts composing a rhabdom.

(||Rhab*doph"o*ra) n. pl. [NL., fr. Gr. "ra`bdos a rod + to bear.] (Zoöl.) An extinct division of Hydrozoa which includes the graptolities.

(||Rhab`do*pleu"ra) n. [NL., fr. Gr. "ra`bdos a rod + the side.] (Zoöl.) A genus of marine Bryozoa in which the tubular cells have a centralchitinous axis and the tentacles are borne on a bilobed lophophore. It is the type of the order Pterobranchia, or Podostomata

(Rhab"do*sphere) n. [Gr. "ra`bdos a rod + E. sphere.] A minute sphere composed of rhabdoliths.

(||Rha`chi*al"gi*a) n. [NL.] See Rachialgia.

(Rha*chid"i*an) a. Of or pertaining to the rhachis; as, the rhachidian teeth of a mollusk.

(||Rhach`i*glos"sa) n. pl. [NL. See Rhachis, and Glossa.] (Zoöl.) A division of marine gastropods having a retractile proboscis and three longitudinal rows of teeth on the radula. It includes many of the large ornamental shells, as the miters, murices, olives, purpuras, volutes, and whelks. See Illust. in Append.

(||Rha*chil"la) n. [NL., fr. Gr. "ra`chis the spine.] (Bot.) A branch of inflorescence; the zigzag axis on which the florets are arranged in the spikelets of grasses.

(Rha"chi*o*dont) a. [Gr. "ra`chis, -ios, the spine + a tooth.] (Zoöl.) Having gular teeth formed by a peculiar modification of the inferior spines of some of the vertebræ, as certain South African snakes (Dasypeltis) which swallow birds' eggs and use these gular teeth to crush them.

(||Rha"chis) n.; pl. E. Rhachises L. Rhachides [See Rachis.] [Written also rechis.]

1. (Anat.) The spine.

2. (Bot.) (a) The continued stem or midrib of a pinnately compound leaf, as in a rose leaf or a fern. (b) The principal axis in a raceme, spike, panicle, or corymb.

  By PanEris using Melati.

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