'To splice the main brace' definitions:

Definition of 'To splice the main brace'

From: GCIDE

Splice \Splice\ (spl[imac]s), v. t. [imp. & p. p. Spliced (spl[imac]st); p. pr. & vb. n. Splicing.] [D. splitsen, splitten; akin to G. splissen, Sw. splissa, Dan. splisse, and E. split; -- from the dividing or splitting the ends into separate strands. See Split, v. t.]
1. To unite, as two ropes, or parts of a rope, by a particular manner of interweaving the strands, -- the union being between two ends, or between an end and the body of a rope. [1913 Webster]
2. To unite, as spars, timbers, rails, etc., by lapping the two ends together, or by applying a piece which laps upon the two ends, and then binding, or in any way making fast. [1913 Webster]
3. To unite in marriage. [Slang] [1913 Webster]
Splice grafting.ee under Grafting.
To splice the main brace (Naut.), to give out, or drink, an extra allowance of spirits on occasion of special exposure to wet or cold, or to severe fatigue; hence, to take a dram. [1913 Webster]