plural of four-seam fastball

(construction) A standing seam that uses a double overlapping interlock between two metal panels.

plural of double lock standing seam

plural of seaman

A mariner or sailor, one who mans a ship. Opposed to landman or landsman. / (Britain, Navy) A person of the lowest rank in the Navy, below able seaman.

Befitting a seaman. / indicating competent seamanship.

the lowest grade of seaman in the merchant marine; the grade below able seaman

(baseball) A four-seam fastball.

(baseball) A two-seam fastball.

A person who sews seams. / Part of a sewing machine that creates seams. / (cricket) A bowler skilled at making the ball seam.