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Meaning of square splice

square' splice"

Pronunciation: [key]
— Carpentry. Carpentry.
  1. a scarf joint between two pieces, having the form of a half-lap joint with a thicker and a thinner section for each piece, the thicker one being at the end: used to resist tension.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.