Index of English words, starting with "pe"

(1) - Peroxide (n.) An oxide containing more oxygen than some other oxide of the same element. Formerly peroxides were regarded as the highest oxides. Cf. Per-, 2.

(1) - Perpend (v. i.) To attend; to be attentive.
(2) - Perpend (v. t.) To weight carefully in the mind.

(1) - Perpendicular (n.) A line or plane falling at right angles on another line or surface, or making equal angles with it on each side.
(2) - Perpendicular (n.) A line at right angles to the plane of the horizon; a vertical line or direction.
(3) - Perpendicular (a.) At right angles to a given line or surface; as, the line ad is perpendicular to the line bc.
(4) - Perpendicular (a.) Exactly upright or vertical; pointing to the zenith; at right angles to the plane of the horizon; extending in a right line from any point toward the center of the earth.

(1) - Perpendicularity (n.) The quality or state of being perpendicular.