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PER'IGEE PERIGE'UM, n. [Gr. about, and the earth.] That point in the orbit of th...
PER'IGORD-STONE, n. An ore of manganese of a dark gray color, like basalt or tra...
PER'IGRAPH, n. [Gr. about, and a writing.] 1. A careless or inaccurate delineati...
PERIG'YNOUS, a. [Gr. about, and female.] In botany, inserted around the pistil, ...
PERIHE'LION PERIHE'LIUM, n. [Gr. about, and the sun.] That part of the orbit of ...
PERIHEXAHE'DRAL, a. [Gr.] Designating a crystal whose primitive form is a four s...
PER'IL, n. [L. periculum, from Gr. to try, to attempt, that is, to strain; an at...
PER'ILOUS, a. Dangerous; hazardous; full of risk; as a perilous undertaking; a p...
PER'ILOUSLY, adv. Dangerously; with hazard.
PER'ILOUSNESS, n. Dangerousness; danger; hazard.
PERIM'ETER, n. [Gr. about, and measure.] In geometry, the bounds and limits of a...
PERIOCTAHE'DRAL, a. [Gr. octahedral.] Designating a crystal whose primitive form...
PE'RIOD, n. [L. periodus; Gr. about, and way.] 1. Properly, a circuit; hence, th...
PERIOD'IC PERIOD'ICAL, a. 1. Performed in a circuit, or in a regular revolution ...
PERIOD'ICALLY, adv. At stated periods; as a festival celebrated periodically.
PERIOS'TEUM, n. [Gr. about, and bone.] A nervous vascular membrane endued with q...