We found one dictionary that defines the word undeleterious:

General (1 matching dictionary)

1. undeleterious: Wiktionary

Definitions from Wiktionary (undeleterious) ▸ adjective:  Not deleterious. ▸ Words similar to undeleterious ▸ Usage examples for undeleterious ▸ Idioms related to undeleterious ▸ Wikipedia articles (New!) ▸ Popular nouns described by undeleterious ▸ Words that often appear near undeleterious ▸ Rhymes of undeleterious ▸ Invented words related to undeleterious