Definition of posca in English:

posca

Pronunciation /ˈpɒskə/

noun

historical
  • A mixture of vinegar and water.

Origin

Late Middle English; earliest use found in Palladius' De Re Rustica. From classical Latin pōsca mixture of vinegar and water, literally ‘drink’ (Plautus; in post-classical Latin also pusca) from the stem of pōtāre to drink + -sca (in ēsca food).