{ Hyp`o*di*crot"ic (?), Hyp`o*di"cro*tous (?), } a. (Physiol.)
Exhibiting retarded dicrotism; as, a hypodicrotic pulse curve.
Hyp`o*gÊ"ic (?), a. [Pref. hypo- + Gr. gai^a, gh^, earth.] (Chem.)
Pertaining to, or obtained from, the peanut, or earthnut (Arachis
hypogÊa).
HypogÊic acid (Chem.), an acid in the oil of the earthnut, in which it
exists as a glyceride, and from which it is extracted as a white,
crystalline substance.
Hyp`o*gas"tric (?), a. [Cf. F. hypogastrique. See Hypogastrium.]
(Anat.) Of or pertaining to the hypogastrium or the hypogastric region.
Hypogastric region. (a) The lower part of the abdomen. (b) An arbitrary
division of the abdomen below the umbilical and between the two iliac
regions.
||Hyp`o*gas"tri*um (?), n. [NL., fr. Gr. &?;; &?; under + &?; belly.]
||(Anat.) The lower part of the abdomen.
Hyp`o*ge"an (?), a. [Pref. hypo- + Gr. &?; earth.] (Bot.) Hypogeous.
[Written also hypogÊan.]
Hyp"o*gene (?), a. [Pref. hypo- + the root of Gr. &?; to be born: cf.
F. hypogËne.] (Geol.) Formed or crystallized at depths beneath the
earth's surface; -- said of granite, gneiss, and other rocks, whose
crystallization is believed of have taken place beneath a great
thickness of overlying rocks. Opposed to epigene.
Hyp`o*ge"ous (?), a. [See Hypogean.] (Bot.) Growing under ground;
remaining under ground; ripening its fruit under ground. [Written also
hypogÊous.]
||Hyp`o*ge"um (?), n.; pl. Hypogea (#). [L., fr. Gr. &?;, &?;,
||subterranean; &?; under + &?;, &?;, the earth.] (Anc. Arch.) The
||subterraneous portion of a building, as in amphitheaters, for the
||service of the games; also, subterranean galleries, as the catacombs.
Hyp`o*glos"sal (?), a. [Pref. hypo- + Gr. &?; the tongue.] (Anat.)
Under the tongue; -- applied esp., in the higher vertebrates, to the
twelfth or last pair of cranial nerves, which are distributed to the
base of the tongue. -- n. One of the hypoglossal nerves.
Hy*pog"na*tous (?), a. [Pref. hypo- + Gr. &?; the jaw.] (Zoˆl.) Having
the maxilla, or lower jaw, longer than the upper, as in the skimmer.
Hyp"o*gyn (?), n. (Bot.) An hypogynous plant.
Hy*pog"y*nous (?), a. [Pref. hypo- + Gr. &?; woman, female: cf. F.
hypogyne.] (Bot.) Inserted below the pistil or pistils; -- said of
sepals, petals, and stamens; having the sepals, petals, and stamens
inserted below the pistil; -- said of a flower or a plant. Gray.
Hy`po*hy"al (?), a. [Pref. hypo- + Greek letter &?;.] (Anat.)
Pertaining to one or more small elements in the hyoidean arch of
fishes, between the caratohyal and urohyal. -- n. One of the hypohyal
bones or cartilages.
Hy`po*nas"tic (?), a. [Pref. hypo- + Gr. &?; pressed close.] (Bot.)
Exhibiting a downward convexity caused by unequal growth. Cf.
Epinastic.
Hy`po*nas"ty (?), n. (Bot.) Downward convexity, or convexity of the
inferior surface.
Hy`po*ni"trite (?), n. (Chem.) A salt of hyponitrous acid.
Hy`po*ni"trous (?), a. [Pref. hypo- + nitrous.] (Chem.) Containing or
derived from nitrogen having a lower valence than in nitrous compounds.
Hyponitrous acid (Chem.), an unstable nitrogen acid, NOH, whose salts
are produced by reduction of the nitrates, although the acid itself is
not isolated in the free state except as a solution in water; -- called
also nitrosylic acid.
||Hy`po*phar"ynx (?), n. [NL. See Hypo-, and Pharynx.] (Zoˆl.) An
||appendage or fold on the lower side of the pharynx, in certain
||insects.
Hy`po*phos"phate (?), n. (Chem.) A salt of hypophosphoric acid.
Hy`po*phos"phite (?), n. (Chem.) A salt of hypophosphorous acid.
Hy`po*phos*phor"ic (?), a. [Pref. hypo- + phosphoric.] (Chem.)
Pertaining to, or derived from, or containing, phosphorus in a lower
state of oxidation than in phosphoric compounds; as, hypophosphoric
acid.
Hypophosphoric acid (Chem.), an acid, P2H4O6, produced by the slow
oxidation of moist phosphorus, and isolated only as a solution in
water. It is regarded as a condensation product of one molecule of
phosphoric acid with one of phosphorous acid, by partial dehydration.
Hy`po*phos"phor*ous (?), a. [Pref. hypo- + phosphorous.] (Chem.)
Pertaining to, or containing, phosphorus in a lower state of oxidation
than in phosphoric compounds; as, hypophosphorous acid.
Hypophosphorous acid (Chem.) , an acid, H3PO2, whose salts are produced
by the action of barium hygrate on phosphorus. It may be obtained from
its water solution, by exaporation and freezing, as a white crystalline
substance. It is a powerful reducing agent.
Hy*poph"yl*lous (?), a. [Pref. hypo- + Gr. &?; leaf.] (Bot.) Being or
growing on the under side of a leaf, as the fruit dots of ferns.
Hy`po*phys"i*al (?), a. (Anat.) Of or pertaining to the hypophysis;
pituitary.
||Hy*poph"y*sis (?), n. [NL., fr. Gr. &?; under + &?; nature, origin.]
||1. (Anat.) See Pituitary body, under Pituitary.