1. lengthwise - Adjective
2. lengthwise - Adverb
In the direction of the length; in a longitudinal direction.
Source: Webster's dictionaryI need about three seats lengthwise to sleep on a plane. It's not easy for me to curl up. Kareem Abdul-Jabbar
the lengthwise dimension Source: Internet
He cut the paper lengthwise Source: Internet
A sago starch filter Sago is extracted from Metroxylon palms by splitting the stem lengthwise and removing the pith which is then crushed and kneaded to release the starch before being washed and strained to extract the starch from the fibrous residue. Source: Internet
Add the carrots and parsnips (peeled and cut in 3 lengthwise), turnips (peeled and cut in 4 crosswise), leeks (dark, hard ends removed, cut in 4 crosswise, rinsed and tied together - or one by one- with ) and celery (in 1-inch chunks). Source: Internet
Fingerboards are dressed to a particular transverse curve, and have a small lengthwise "scoop," or concavity, slightly more pronounced on the lower strings, especially when meant for gut or synthetic strings. Source: Internet