putlog noun. ['pʌtlɒg] Also (earlier) putlock [-lɒk]. M17.
[Perh. from put pa. pple of PUT verb¹ + LOG noun¹.]
A short horizontal timber projecting from a wall to serve as a support for scaffold-boards.

Comb.:
putlog-hole a hole left in a wall to receive a putlog.

[TahlilGaran] English Dictionary ▲