Defn: A line or plane falling at right angles on another line or surface, or making equal angles with it on each side.
PERPENDICULARITY
Per`pen*dic`u*lar"i*ty, n. Etym: [Cf. F. perpendicularité.]
Defn: The quality or state of being perpendicular.
PERPENDICULARLY
Per`pen*dic"u*lar*ly, adv.
Defn: In a perpendicular manner; vertically.
PERPEND STONE
Per"pend stone`.
Defn: See Perpender.
PERPENSION
Per*pen"sion, n. Etym: [See Perpend.]
Defn: Careful consideration; pondering. [Obs.] Sir T. Browne.
PERPENSITY
Per*pen"si*ty, n.