In a reciprocal manner; by way of returning (e.g. a favour, insult, etc).

mosquito fern (any of several species of small floating aquatic ferns in the genus Azolla)

(mathematics, mnemonic) An acronym for arithmetic order of operations, with B first and AS last: Brackets, then order or 'of' in some curricula, then multiplication and division, then addition and ...

A type of baked or fried filled pastry of the former Ottoman Empire.