PENTACHENIUM
Pen`ta*che"ni*um, n. Etym: [NL. See Penta-, and Achenium.] (Bot.)
Defn: A dry fruit composed of five carpels, which are covered by an epigynous calyx and separate at maturity.
PENTACHLORIDE
Pen`ta*chlo"ride, n. Etym: [Penta- + chloride.] (Chem.)
Defn: A chloride having five atoms of chlorine in each molecule.
PENTACHORD
Pen"ta*chord, n. Etym: [L. pentachordus five-stringed, Gr.
1. An ancient instrument of music with five strings.
2. An order or system of five sounds. Busby.
PENTACID
Pen*tac"id ( Etym: [Penta- + acid.] (Chem.)
Defn: Capable of neutralizing, or combining with, five molecules of a monobasic acid; having five hydrogen atoms capable of substitution by acid residues; — said of certain complex bases.
PENTACLE
Pen"ta*cle, n. Etym: [Gr.