16 letters · 26 points in Scrabble
noun the relation of opposition between things at right angles
noun the quality of being at right angles to a given line or plane (especially the plane of the horizon)
originEtymology tree English perpendicular Proto-Indo-European *-teh₂ Proto-Indo-European *-ts Proto-Indo-European *-teh₂ts Latin -itāsder. Old French -itebor. Middle English -ite English -ity English perpendicularity From perpendicular + -ity.
Etymology from Wiktionary, CC BY-SA 3.0