1) half, part also called "shekel of the sanctuary" or "holy shekel" 2) half a shekel (meton) There appears to be at least three different shekels, one of silver, gold and copper. See a Bible Dictionary for a complete treatment of the subject.
STRONG'S WORD STUDY
H1235 — בֶּ֫קַע
be.qa · bekah · Hebrew/Aramaic
2 tagged verse occurrences
Genesis 24:22 · בֶּ֖קַעAnd it came to pass, as the camels had done drinking, that the man took a golden earring of half a shekel weight, and two bracelets for her hands of ten [shekels] weight of gold;Exodus 38:26 · בֶּ֚קַעA bekah for every man, [that is], half a shekel, after the shekel of the sanctuary, for every one that went to be numbered, from twenty years old and upward, for six hundred thousand and three thousand and five hundred and fifty [men].