I. ˈ ̷ ̷ˌ ̷ ̷ adverb
Etymology: length + -wise
: in the direction of the length : longitudinally
opened his newspaper, folded it lengthwise — Nathaniel Benchley
II. adjective
: moving, placed, or directed on or toward the long axis
tiers of planks had been fashioned into lengthwise seats — Agnes M. Cleaveland