perpendicular

Part of speech: adverb

Perpendicularly.

Part of speech: noun

Perpendicularity.

Part of speech: adjective

Upright; vertical; meeting a given line at right angles.

Part of speech: noun

A perpendicular line.

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Usage examples "perpendicular":

  1. It was trying to the nerves, for while on one side rose a perpendicular wall of rock, on the other the precipice went sheer down for several hundred feet, with a roaring torrent at the bottom. - "On the Banks of the Amazon", W.H.G. Kingston.
  2. The lathe, however, need not be directly beneath the counter shaft as the belt will run on an angle as well as perpendicular. - "A Course In Wood Turning", Archie S. Milton and Otto K. Wohlers.
  3. Looking back at the solid and apparently perpendicular rock, nearly a mile high, it seemed impossible that any one could ascend to the top. - "The Lure of the Camera", Charles S. Olcott.