(||Hy*pot"ri*cha) n. pl. [NL., fr. Gr. "ypo` beneath + a hair.] (Zoöl.) A division of ciliated
Infusoria in which the cilia cover only the under side of the body.
(Hy`po*tro"choid) n. [Pref. hypo- + trochoid.] (Geom.) A curve, traced by a point
in the radius, or radius produced, of a circle which rolls upon the concave side of a fixed circle. See
Hypocycloid, Epicycloid, and Trochoid.
(||Hy`po*ty*po"sis) n. [NL., fr. Gr. fr. to sketch out; under + to impress.] (Rhet.) A vivid,
picturesque description of scenes or events.
(Hy`po*xan"thin) n. [Pref. hypo- + xanthin.] (Physiol. Chem.) A crystalline, nitrogenous
substance, closely related to xanthin and uric acid, widely distributed through the animal body, but especially
in muscle tissue; called also sarcin, sarkin.
(Hy`po*zo"ic) a. [Pref. hypo- + Gr. an animal.] (Geol.) Anterior in age to the lowest rocks
which contain organic remains. Lyell.
(Hyp"pish) a. [From Hyp.] Affected with hypochondria; hypped. [Written also hyppish.]
(Hyp"po*griff) n. See Hyppogriff.
(Hyp"si*loid) a. [From &UPSILON, the Greek letter called "upsilon" + -oid.] (Anat.) Resembling
the Greek letter &UPSILON in form; hyoid.
(Hyp*som"e*ter) n. [Gr. height + -meter.] (Physics) An instrument for measuring heights
by observation of barometric pressure; esp., one for determining heights by ascertaining the boiling point
of water. It consists of a vessel for water, with a lamp for heating it, and an inclosed thermometer for
showing the temperature of ebullition.
(Hyp`so*met"ric Hyp`so*met"ric*al) a. Of or pertaining to hypsometry.
(Hyp*som"e*try) n. That branch of the science of geodesy which has to do with the measurement
of heights, either absolutely with reference to the sea level, or relatively.
(Hy*pu"ral) a. [Pref. hypo- + Gr. tail.] (Anat.) Under the tail; applied to the bones which
support the caudal fin rays in most fishes.
(Hy"ra*coid) a. (Zoöl.) Of or pertaining to the Hyracoidea. n. One of the Hyracoidea.
(||Hyr`a*coi"de*a) n. pl. [NL. See Hyrax, and oid.] (Zoöl.) An order of small hoofed mammals,
comprising the single living genus Hyrax.
(||Hy"rax) n. [NL., fr. Gr. shrew mouse.] (Zoöl.) Any animal of the genus Hyrax, of which about
four species are known. They constitute the order Hyracoidea. The best known species are the daman
(H. Syriacus) of Palestine, and the klipdas (H. capensis) of South Africa. Other species are H. arboreus
and H. Sylvestris, the former from Southern, and the latter from Western, Africa. See Daman.
(Hyr*ca"ni*an Hyr"can) a. Of or pertaining to Hyrcania, an ancient country or province of
Asia, southeast of the Caspian (which was also called the Hyrcanian) Sea. "The Hyrcan tiger." "Hyrcanian
(Hyrse) n. [G. hirse, OHG. hirsi.] (Bot.) Millet.
(Hyrst) n. A wood. See Hurst.
(Hy"son) n. [Chin. hi-tshun, lit., first crop, or blooming spring.] A fragrant kind of green tea.