"lengthways" in the adjective sense
1. lengthwise, lengthways
running or extending in the direction of the length of a thing
"the lengthwise dimension"
"lengthways" in the adverb sense
1. lengthways, lengthwise, longwise, longways, longitudinally
in the direction of the length
"He cut the paper lengthwise"
Source: WordNet® (An amazing lexical database of English)
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