Mar"tin, n. [F. martin, from the proper name Martin. Cf. Martlet.] (Zoöl.) One of several species of swallows, usually having the tail less deeply forked than the tail of the common swallows. [Written also marten.]

☞ The American purple martin, or bee martin (Progne subis, or purpurea), and the European house, or window, martin (Hirundo, or Chelidon, urbica), are the best known species.

Bank martin. (a) The bank swallow. See under Bank. (b) The fairy martin. See under Fairy. -- Bee martin. (a) The purple martin. (b) The kingbird. -- Sand martin, the bank swallow.

Mar"tin (?), n. (Stone Working) [Etymol. uncertain.] A perforated stone-faced runner for grinding.