Meaning of decad | Babel Free

Definitions

1. Archaic form of decade (“period of ten years”).
   alt-of, archaic
2. Archaic form of decade (“group of ten”).
   alt-of, archaic
3. A group of ten notes from which the consonant triads may be constructed

Examples

“Since Averill was a decad and a half / His elder, and their parents underground”

“Plato […] extends number as far as to the decad.”

CEFR level