pentad
English
/ˈpɛntæd/
noun
Definitions
- A group or series of five things.
- A mean average value of temperature, etc., taken every five days.
- (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.
Etymology
Derived from Ancient Greek πεντάς.
Origin
Ancient Greek
πεντάς