Transverse
Part of speech: adjective
Definition: Situated or lying across; side to side, relative to some defined "forward" direction. Not tangent: so that a nondegenerate angle is formed between the two things intersecting.
Thwartwise
Part of speech: adjective
Definition: Athwart; from side to side; across.
Part of speech: adverb
Definition: Athwart; from side to side; across.