trun·nel /ˈtrʌnḷ/
Tree·nail n. Shipbuilding A long wooden pin used in fastening the planks of a vessel to the timbers or to each other. [Written also trenail, and trunnel.]
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Trun·nel, n. Shipbuilding See Treenail.
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trunnel
n : a wooden peg that is used to fasten timbers in shipbuilding;
water causes the peg to swell and hold the timbers fast
[syn: treenail, trenail]