/ Dictionary / Index P perinuclear: Meaning and Definition of Find definitions for: per•i•nu•cle•ar Pronunciation: (per"u-n'klē-ur, -ny'- or, by metathesis, -kyu-lur), [key] — adj. Cell Biol. situated near or occurring around the nucleus. pertaining to the narrow space between the inner and outer layers of the nuclear membrane. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. perineurium period Related Content Daily Word Quiz: hale Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language