toe·nail 
(tōnāl′)
(tōnāl′)n.
1. The thin, horny, transparent plate covering the upper surface of the end of a toe.
2. A nail driven obliquely, as to join vertical and horizontal beams.
tr.v. toe·nailed, toe·nail·ing, toe·nails
To secure (beams) with obliquely driven nails.