Bible Dictionaries
Tail-Bay

Webster's Dictionary

(1):

(n.) One of the joists which rest one end on the wall and the other on a girder; also, the space between a wall and the nearest girder of a floor. Cf. Case-bay.

(2):

(n.) The part of a canal lock below the lower gates.

Bibliography Information
Webster, Noah. Entry for 'Tail-Bay'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​t/tail-bay.html. 1828.