Periblast
(Per"i*blast) a. [Gr. to grow around. See Peri-, and -blast.] (Biol.) The protoplasmic matter
which surrounds the entoblast, or cell nucleus, and undergoes segmentation. — Per`i*blas"tic, a.
Periblem
(Per"i*blem) n. [Pref. peri- + root of Gr. to sprout.] (Bot.) Nascent cortex, or immature cellular
bark.
Peribolos
(||Pe*rib"o*los) n. [Nl., fr. Gr. fr. adj., going round, fr. to throw round; cf. L. peribolus.] In
ancient architecture, an inclosed court, esp., one surrounding a temple.
Peribranchial
(Per`i*bran"chi*al) a. (Anat.) Surrounding the branchiæ; as, a peribranchial cavity.
Peribranchial
(Per`i*bran"chi*al) a. (Anat.) Around the bronchi or bronchial tubes; as, the peribronchial
lymphatics.
Pericambium
(||Per`i*cam"bi*um) n. [NL. See Peri-, and Cambium.] (Biol.) A layer of thin-walled
young cells in a growing stem, in which layer certain new vessels originate.
Pericardiac
(Per`i*car"di*ac Per`i*car"di*al) a. (Anat.) Of or pertaining to pericardium; situated around
the heart.
Pericardial fluid (Physiol.), a serous fluid of a pale yellow color contained in the pericardium.
Pericardian
(Per`i*car"di*an) a. Pericardiac.
Pericardic
(Per`i*car"dic) a. Pericardiac.
Pericarditus
(||Per`i*car*di"tus) n. [NL. See Pericardium, and -itis.] (Med.) Inflammation of the pericardium.
Dunglison.
Pericardium
(Per`i*car"di*um) n. [NL., fr. Gr. fr. about or near the heart; about + heart.] (Anat.) The
double baglike fold of serous membrane which incloses the heart.
The inner layer is closely adherent to the outer surface of the heart, and is called the cardiac pericardium.
The outer layer loosely incloses the heart and the adherent inner layer, and is called the parietal pericardium.
At the base of the heart the two layers are continuous, and form a narrow closed cavity filled with fluid,
in which the pulsations of the heart cause little friction.
Pericarp
(Per"i*carp) n. [Gr. around + fruit: cf. F. péricarpe.] (Bot.) The ripened ovary; the walls of the
fruit. See Illusts. of Capsule, Drupe, and Legume.
Pericarpial
(Per`i*car"pi*al Per`i*car"pic) , a. (Bot.) Of or pertaining to a pericarp.
Pericellular
(Per`i*cel"lu*lar) a. (Anat.) Surrounding a cell; as, the pericellular lymph spaces surrounding
ganglion cells.
Perichæth
(Per"i*chæth) n. [See Perichætium.] (Bot.) The leafy involucre surrounding the fruit stalk of mosses; perichætium; perichete.
Perichætial
(Per`i*chæ"ti*al) a. (Bot.) Of or pertaining to the perichæth.
Perichætium
(||Per`i*chæ"ti*um) n.; pl. Perichætia [NL., fr. Gr. about + flowing hair, foliage.] (Bot.) Same
as Perichæth.
Perichætous
(Per`i*chæ"tous) a. [See Perichætium.] (Zoöl.) Surrounded by setæ; — said of certain earthworms
(genus Perichætus).
Perichete
(Per"i*chete) n. Same as Perichæth.
