Nonad

Full definition of nonad

Noun

1. a collection, or series of nine things

Derived terms

• nonadic

Usage notes

True nonads seem to be rare. Most collections of nine things are actually triads of triads.

Also the name of a photographic filter used for astronomy, meaning "no Sodium D-line", where Sodium has the symbol Na, from the Latin natrium.

Anagrams

• Donna
• Nando