Perithecium
(||Per`i*the"ci*um) n. [NL., fr. Gr. around + box.] (Bot.) An organ in certain fungi and
lichens, surrounding and enveloping the masses of fructification. Henslow.
Peritomous
(Pe*rit"o*mous) a. [Gr. cut off all around. See Peri-, and Tome.] (Min.) Cleaving in more
directions than one, parallel to the axis.
Peritonæum
(Per`i*to*næ"um) n. (Anat.) Same as Peritoneum.
Peritoneal
(Per`i*to*ne"al) a. [Cf. F. péritonéal.] (Anat.) Of or pertaining to the peritoneum.
Peritoneum
(Per`i*to*ne"um) n. [L. peritoneum, peritonaeum, Gr. fr. to stretch all around or over; around
+ to stretch.] (Anat.) The smooth serous membrane which lines the cavity of the abdomen, or the whole
body cavity when there is no diaphragm, and, turning back, surrounds the viscera, forming a closed, or
nearly closed, sac. [Written also peritonæum.]
Peritonitis
(||Per`i*to*ni"tis) n. [NL. See Peritoneum, and -itis.] (Med.) Inflammation of the peritoneum.
Peritracheal
(Per`i*tra"che*al) a. (Zoöl.) Surrounding the tracheæ.
Peritreme
(Per"i*treme) n. [Pref. peri- + Gr. a hole.] (Zoöl.) (a) That part of the integument of an
insect which surrounds the spiracles. (b) The edge of the aperture of a univalve shell.
Peritricha
(||Pe*rit"ri*cha) n. pl. [NL., fr. Gr. about + hair.] (Zoöl.) A division of ciliated Infusoria having
a circle of cilia around the oral disk and sometimes another around the body. It includes the vorticellas.
See Vorticella.
Peritrochium
(||Per`i*tro"chi*um) n. [NL., fr. Gr. around + a wheel.] (Mech.) The wheel which, together
with the axle, forms the axis in peritrochio, which see under Axis.
Peritropal
(Per*it"ro*pal) a. [Gr. fr. to turn around; around + to turn: cf. F. péritrope.]
1. Rotatory; circuitous. [R.]
2. Having the axis of the seed perpendicular to the axis of the pericarp to which it is attached.
Peritropous
(Per*it"ro*pous) a. Peritropal.
Perityphlitis
(||Per`i*typh*li"tis) n. [NL. See Peri-, and Typhlitis.] (Med.) Inflammation of the connective
tissue about the cæcum.
Periuterine
(Per`i*u"ter*ine) a. (Med.) Surrounding the uterus.
Perivascular
(Per`i*vas"cu*lar) a. Around the blood vessels; as, perivascular lymphatics.
Perivertebral
(Per`i*ver"te*bral) a. (Anat.) Surrounding the vertebræ.
Perivisceral
(Per`i*vis"cer*al) a. (Anat.) Around the viscera; as, the perivisceral cavity.
Perivitelline
(Per`i*vi*tel"line) a. [Pref. peri- + vitelline.] (Biol.) Situated around the vitellus, or between
the vitellus and zona pellucida of an ovum.
Periwig
(Per"i*wig) n. [OE. perrwige, perwicke, corrupt. fr. F. perruque; cf. OD. peruyk, from French.
See Peruke, and cf. Wig.] A headdress of false hair, usually covering the whole head, and representing
the natural hair; a wig. Shak.
Periwig
(Per"i*wig), v. t. [imp. & p. p. Perwigged ; p. pr. & vb. n. Perwigging ] To dress with a
periwig, or with false hair. Swift.
