capsquare

English

A capsquare (both top and bottom pieces)

Etymology

From cap +‎ square.

Noun

capsquare (plural capsquares)

1. (military, history) A metal plate that covers the trunnions of a cannon and holds it in place.

References

• “capsquare”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.