The Collaborative International Dictionary
Dogbolt
Dogbolt \Dog"bolt`\, n. (Gun.)
The bolt of the cap-square over the trunnion of a cannon.
--Knight.
Wiktionary
dogbolt
Etymology 1 n. (context obsolete derogatory English) A fool; a butt. Etymology 2
n. The bolt of the capsquare over the trunnion of a cannon.