length·wise 
/ˈlɛŋθˌwaɪz/ adverb
/ˈlɛŋθˌwaɪz/ adverb : in the direction of the long side of something
▪ Split the fruit lengthwise and discard the seeds. ▪ a piece of paper folded lengthwise
▪ Split the fruit lengthwise and discard the seeds. ▪ a piece of paper folded lengthwise
— lengthwise adjective
▪ a lengthwise cut
▪ a lengthwise cut
