Spanish: c.s. (in pharmaceutical documentation)
This is an abbreviation for cantidad suficiente, a "sufficient quantity" of an excipient to make up a given volume. In English, of course, we use Latin, so q.s. is the corresponding abbreviation.
This and more are waiting for you at the utterly tremendous Tremedica glossary of signs and symbols used in Spanish medicine. I wish I'd found this glossary years ago.
