Defn: Any one of the three metameric hydrocarbons, C5H12, of the methane or paraffin series. They are colorless, volatile liquids, two of which occur in petroleum. So called because of the five carbon atoms in the molecule.
PENTANGLE
Pen"tan`gle, n. Etym: [Penta- + angle.]
Defn: A pentagon. [R.] Sir T. Browne.
PENTANGULAR
Pen*tan"gu*lar, a. Etym: [Penta- + angular.]
Defn: Having five corners or angles. [R.]
PENTAPETALOUS
Pen`ta*pet"al*ous, a. Etym: [Penta- + petal.] (Bot.)
Defn: Having five petals, or flower leaves.
PENTAPHYLLOUS
Pen*taph"yl*lous, a. Etym: [Penta- + Gr. (Bot.)
Defn: Having five leaves or leaflets.
PENTAPODY
Pen*tap"o*dy, n. Etym: [Penta- + Gr. (Pros.)