English

Noun

nonad ‎(plural nonads)

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