D defs.my
Entry 1 sense Webster, 1913

Breastrail

/(-rāl`)/ · Breast·rail · IPA
01 n. The upper rail of any parapet of ordinary height, as of a balcony; the railing of a quarter-deck, etc.
  1. 1.
    The upper rail of any parapet of ordinary height, as of a balcony; the railing of a quarter-deck, etc.