A very old gun, 8 or 9 feet long, and of about 5 lbs. calibre: immortalized in Hudibras:
"The cannon, blunderbuss, and saker,
He was th' inventer of, and maker."
The name is thought to have been derived from the French oath sacre.
·noun The peregrine falcon. II. Saker ·noun A small piece of artillery. III. Saker ·noun A falcon ...
Webster's Dictionary of the English Language