PENTAD n.
Any element, atom, or radical, having a valence of five, or which can be combined with, substituted for, or compared with, five atoms of hydrogen or other monad; as, nitrogen is a pentad in the ammonium compounds.
PETIT a.
is abolished in England. -- Petit maître (. Etym: [F., lit., little master.] A fop; a coxcomb; a ladies' man. Goldsmith. -- Petit serjeanty (Eng. Law), the tenure of lands of the crown, by the service of rendering annually some implement of war, as a bow, an arrow, a sword, a flag, etc. -- Petit treason, formerly, i…