z"I -- acronym for zichrono livrachah -- may his memory be a blessing; appended to the names of those who have died

z'man ikul -- point in the digestion process where you still feel the effect of the food or drink in your stomach

Zadukim -- Sadducees

zayde -- grandfather (Yiddish)

zehirut (zehirus) -- awareness

zemirot (zemiros) -- traditional songs for the Shabbat table

Zeraim -- lit.: “seeds”; the first section of the Mishnah, covering agricultural laws and blessings

zerizut (zerizus) -- enthusiasm

zichrono li'vracha -- lit: may his memory be for a blessing; a term of respect when referring to a deceased person

Zohar -- the major book of Jewish mysticism, authorship ascribed to Rabbi Shimon Bar Yochai

zoreh -- winnowing; one of the 39 primary categories of forbidden Shabbat activity

zoreya -- planting; one of the 39 primary categories of forbidden Shabbat activity

zt"l -- acronym for zecher tzaddik livracha -- the memory of a tzaddik is a blessing; honorific appended to the names of deceased rabbis and righteous people