PENTONE
Pen"tone, n. Etym: [See Penta-.] (Chem.)
Defn: Same as Valylene.
PENTOSAN; PENTOSANE
Pen"to*san, n. Also -sane. [From Pentose.] (Chem.)
Defn: One of a class of substances (complex carbohydrates widely distributed in plants, as in fruits, gums, woods, hay, etc.) which yield pentoses on hydrolysis.
PENTOSE
Pen"tose, n. [Penta- + -ose.] (Chem.)
Defn: Any of a group of sugars of the formula C5H10O5, as arabinose; — so called from the five carbon atoms in the molecule. They are not fermented by yeast.
PENTOXIDE
Pen*tox"ide, n. Etym: [Penta- + oxide.] (Chem.)
Defn: An oxide containing five atoms of oxygen in each molecule; as, phosphorus pentoxide, P2O5.
PENTREMITE
Pen"tre*mite, n. (Zoöl.)
Defn: Any species of Pentremites.