Tres"ayle` (tr&ecr;s"&amac;l`), n. [F. trisaieul, from L. tris, tres, three + F. aieul grandfather. Cf. Besaiel, and see Ayle.]
A grandfather's grandfather.
Writ of tresayle O. Eng.Law, a writ which lay for a man claiming as heir to his grandfather's grandfather, to recover lands of which he had been deprived by an abatement happening on the ancestor's death.
Mozley & W.
© Webster 1913.