1. Full of, attended with, or involving, peril; dangerous; hazardous; as, a perilous undertaking.
Infamous hills, and sandy, perilous wilds.
Milton. 2. Daring; reckless; dangerous. [Obs.] Latimer.
For I am perilous with knife in hand.
Chaucer. — Per"il*ous*ly, adv. — Per"il*ous*ness, n.
Perilymph
(Per"i*lymph) n. (Anat.) The fluid which surrounds the membranous labyrinth of the internal
ear, and separates it from the walls of the chambers in which the labyrinth lies.
Perilymphangial
(Per`i*lym*phan"gi*al) a. (Anat.) Around, or at the side of, a lymphatic vessel.
Perilymphatic
(Per`i*lym*phat"ic) a. (Anat.) (a) Pertaining to, or containing, perilymph. (b) Perilymphangial.
Perimeter
(Per*im"e*ter) n. [Gr. around + measure: cf. F. périmètre.]
1. (Geom.) The outer boundary of a body or figure, or the sum of all the sides.
2. An instrument for determining the extent and shape of the field of vision.
Perimetric
(Per`i*met"ric Per`i*met"ric*al) a. Of or pertaining to the perimeter, or to perimetry; as, a perimetric
chart of the eye.
Perimetry
(Per*im"e*try) n. The art of using the perimeter; measurement of the field of vision.
Perimorph
(Per"i*morph) n. [Pref. peri- + Gr. form.] (Min.) A crystal of one species inclosing one of
another species. See Endomorph.
Perimysial
(Per`i*my"sial) a. (Anat.) (a) Surrounding a muscle or muscles. (b) Of or pertaining to
the perimysium.
Perimysium
(||Per`i*my"si*um) n. [NL., fr. Gr. about + muscle.] (Anat.) The connective tissue sheath
which surrounds a muscle, and sends partitions inwards between the bundles of muscular fibers.
Perinæum
(||Per`i*næ"um) n. See Perineum.
Perineal
(Per`i*ne"al) a. (Anat.) Of or pertaining to the perineum.
Perineoplasty
(Per`i*ne"o*plas`ty) n. [Perineum + -plasty.] (Med.) The act or process of restoring an
injured perineum.
Perineorrhaphy
(Per`i*ne*or"rha*phy) n. [Perineum + Gr. to sew.] (Med.) The operation of sewing up
a ruptured perineum.
Perinephritis
(||Per`i*ne*phri"tis) n. [NL. See Peri-, and Nephritis.] (Med.) Inflammation of the cellular
tissue around the kidney. — Per`i*ne*phrit"ic, a.
Perineum
(||Per`i*ne"um) n. [NL., fr. Gr. .] (Anat.) The region which is included within the outlet of the
pelvis, and is traversed by the urinogenital canal and the rectum.
Perineurial
(Per`i*neu"ri*al) a. (Anat.) Surrounding nerves or nerve fibers; of or pertaining to the perineurium.
Perineurium
(||Per`i*neu"ri*um) n. [NL., fr. Gr. about + a nerve.] (Anat.) The connective tissue sheath
which surrounds a bundle of nerve fibers. See Epineurium, and Neurilemma.
