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emoration of the descent of the Holy Spirit on the apostles; which occurred on the day of Pentecost; -- called also Whitsunday. Shak.

Of or pertaining to Pentecost or to Whitsuntide.

Offerings formerly made to the parish priest, or to the mother church, at Pentecost. Shipley.

An officer in the Spartan army commanding fifty men. Mitford.

A troop of fifty soldiers in the Spartan army; -- called also pentecostys. Jowett (Thucyd. ).

Of or pertaining to Mount Pentelicus, near Athens, famous for its fine white marble quarries; obtained from Mount Pentelicus; as, the Pentelic marble of which the Parthenon is built.

Same as Amylene.

m the main wall or building, as over a door or window; a lean-to. Also figuratively. "The penthouse of his eyes." Sir W. Scott.

A penthouse. [Obs.] Sir H. Wotton.

See Pantile.

An unsaturated hydrocarbon, C5H8, of the acetylene series. Same as Valerylene.

Pertaining to, or desingating, an acid (called also valeric acid) derived from pentane.

Same as Valylene.

ohydrates widely distributed in plants, as in fruits, gums, woods, hay, etc.) which yield pentoses on hydrolysis.

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.

An oxide containing five atoms of oxygen in each molecule; as, phosphorus pentoxide, P2O5.

Any species of Pentremites.

A genus of crinoids belonging to the Blastoidea. They have five petal-like ambulacra.

See Lean-to.

A penstock.