MARTLET

Mart″let (?), n. [[F. martinet. See Martin the bird, and cf. Martinet a disciplinarian.]] 1. 1. (Zoöl.) The European house martin.
2. 2. [[Cf. F. merlette.]] (Her.) A bird without beak or feet; — generally assumed to represent a martin. As a mark of cadency it denotes the fourth son.