pentad

In the pentad of 1923-27, U. S. investors paid $34,806,783,000 for 36,965 different issues of bonds and stocks.

From Time Magazine Archive

Five, or the pentad, is everything; it stops the power of poisons, and is dreaded by evil spirits.

From Three Thousand Years of Mental Healing by George Barton Cutten

C. Wachsmuth.—The pentad arrangement in Dio and others.

From Dio's Rome, Volume 1 (of 6) An Historical Narrative Originally Composed in Greek during the Reigns of Septimius Severus, Geta and Caracalla, Macrinus, Elagabalus and Alexander Severus: and Now Presented in English Form by Cassius Dio

An element having a valence of one is a monad; of two, a dyad; three, a triad; four, tetrad; five, pentad; six, hexad, etc.

From An Introduction to Chemical Science by Rufus Phillips Williams

The word pentad at once recalls to you the way in which the chemist speaks of a monad, triad, heptad, when he deals with elements.

From An Introduction to Yoga by Annie Wood Besant