Pentad

[pentæd]

解釋/意思:

(n.) 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; as, nitrogen is a pentad in the ammonium compounds.

(a.) Having the valence of a pentad.

伊桑錄入

解釋/意思:

n. the number five a group of five things: a mean of temperature &c. taken every five days.

錄入:朱莉