Associations to the word «Pentad»

Wiktionary

PENTAD, noun. A group or series of five things
PENTAD, noun. (chemistry) Any element, atom, or radical having a valence of five, or which can be combined with, substituted for, or compared with, five atoms of hydrogen or other monad.

Dictionary definition

PENTAD, noun. The cardinal number that is the sum of four and one.

Wise words

Man is a creature who lives not upon bread alone, but principally by catch words.
Robert Louis Stevenson