A mother of someone's parent. / A female ancestor or progenitor.

A person of authority in the military who has not received a commission (a direct conveyance of authority from the sovereign government); as such they can have charge or control but not command in ...

(biochemistry) A fermentation vat, containing microorganisms or biochemically active substances, used for waste recycling or for making drugs.

Pennisetum glaucum (pearl millet) / Setaria parviflora (marsh bristlegrass) / Setaria pumila (yellow foxtail, pigeon grass, cattail grass)