פֶּטֶר (piṭrâ) is
a Hebrew noun
meaning that which separates. It appears
12 times
in 3 books of the Hebrew Bible
(Strong's H6363).
Also rendered
firstborn
Same Hebrew root (TWOT 1764a)
Range of meaning (TWOT 1764a)that which separates, first opens; fissure, firstling; openeth, such as open
Full entry: Brown-Driver-Briggs and Strong's
פֶּ֫טֶרnoun, masculine: that which separates, first opens
Strong's H6363פֶּטֶר: a fissure, i.e. (concretely) firstling (as opening the matrix) KJV:firstling, openeth, such as open.
Meanings: Brown-Driver-Briggs (1906) and Strong's Hebrew Dictionary (1890), public domain, via the Open Scriptures Hebrew Bible Project (CC BY 4.0). TWOT numbers for reference only.
Root family 1764: פָּטוּרpāṭûr — separate, remove, set free; escape; they separated with the lip; opened, a bud, unoccupied, cleave, burst through, emit; free, dismiss, let out, slip away