C.O.S.

cash on shipment.

Also, c.o.s.

* * *

cos «kos, ks», noun, or cos lettuce,

= romaine. (Cf. ↑romaine)

╂[< Greek Côs, an island in the Aegean, from which it was introduced]

cos (no period),

cosine.

cos.,

1. companies.

2. counties.

COS or c.o.s.,

cash on shipment.