Crossword clue: a unit of capacity or volume in the apothecary system equal to one eighth of a fluid ounce

The most common answer is drachm (6 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

drachm 6 letters wn-def

a unit of capacity or volume in the apothecary system equal to one eighth of a fluid ounce

fluidram 8 letters wn-def

a unit of capacity or volume in the apothecary system equal to one eighth of a fluid ounce