Perpendicular (adj)
pur-pen-dik-oo-lar
At an angle of 90° to a given line, plane, or surface or to the ground.
Late Middle English (as an adverb meaning ‘at right angles’): via Old French from Latin perpendicularis, from perpendiculum ‘plumb line’, from per- ‘through’ + pendere ‘to hang’.
Example sentences
“The lamp post sat perpendicular to the street.”
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