jack block

Fetched 2026-10-26 (cache).

Synonyms: rack block, jack black, backblock, jack back, cock block

Antonyms: rack block, jack black, backblock, jack back, cock block

Related words from Datamuse; suggestions, not definitions.

Noun

1. {{lb|en|nautical}} A block fixed in the [[topgallant]] or royal rigging, used for raising and lowering light masts and spars.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.