Strong's #6363: peter (pronounced peh'-ter)

or pitrah {pit-raw'}; from 6362; a fissure, i.e. (concretely) firstling (as opening the matrix):--firstling, openeth, such as open.

Brown-Driver-Briggs Hebrew Lexicon:

ּ / ּ

peṭer / piṭrâh

1) firstborn, firstling, that which separates or first opens

Part of Speech: noun masculine

Relation: from H6362

Same Word by TWOT Number: 1764a, 1764b

Usage:

This word is used 12 times:

 

Exodus 13:2: "unto me all the firstborn, whatsoever openeth the womb among the children of Israel, both of man"
Exodus 13:12: "That thou shalt set apart unto the LORD all that openeth the matrix, and every firstling that cometh"
Exodus 13:12: "that openeth the matrix, and every firstling that cometh of a beast which thou hast;"
Exodus 13:13: "And every firstling of an ass thou shalt redeem with a lamb; and if thou wilt not redeem"
Exodus 13:15: "therefore I sacrifice to the LORD all that openeth the matrix, being males;"
Exodus 34:19: "All that openeth the matrix is mine; and every firstling among thy cattle, whether ox or sheep,"
Exodus 34:19: "that openeth the matrix is mine; and every firstling among thy cattle, whether ox or sheep, that is male."
Exodus 34:20: " But the firstling of an ass thou shalt redeem with a lamb: and if thou redeem him not, then shalt thou break his neck."
Numbers 3:12: "of Israel instead of all the firstborn that openeth the matrix among the children"
Numbers 8:16: "unto me from among the children of Israel; instead of such as open every womb,"
Numbers 18:15: "Every thing that openeth the matrix in all flesh, which they bring unto the LORD,"
Ezekiel 20:26: "them in their own gifts, in that they caused to pass through the fire all that openeth the womb, that I might make them desolate, to the end"