a wooden pin that swells when moist, used for fastening together timbers, as those of ships.
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How to use treenail in a sentence
A treenail driven in here and there serves to keep all in place by nipping the cross poles tightly.
This, after being faced and hewn with the adze, is passed through a double-handed cutting instrument known as a treenail tool.
In wild countries any tough straight-grained wood may be selected for treenail making.
The perch bolt (D) should be an iron pin, but may be a hard wood treenail.
When we found that no one was inside we told Captain treenail of the man we had seen climbing up the cliff.Captain Mugford | W.H.G. Kingston
British Dictionary definitions for treenail
a dowel used for pinning planks or timbers together
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012