We found one dictionary that defines the word lineman's splice:

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1. lineman's splice: Wiktionary

Definitions from Wiktionary (lineman's splice) ▸ noun:  Synonym of Western Union splice ▸ Words similar to lineman's splice ▸ Usage examples for lineman's splice ▸ Idioms related to lineman's splice ▸ Wikipedia articles (New!) ▸ Words that often appear near lineman's splice ▸ Rhymes of lineman's splice ▸ Invented words related to lineman's splice