lengthways

adj, adv — 2 senses

adj

Etymology From length + -ways.

lengthwise

Threads of silk and cotton are so arranged in parallel lines, lengthways with the note, and embodied in the substance of the paper during its manufacture.1847, editorial staff, “Method of Preserving the Denominations of a Bank Bill from being Altered”, in Scientific American, series 1, Volume 3, Issue 9, page 68:

adv

Etymology From length + -ways.

lengthwise

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.