We found 7 dictionaries that define the word pentoxides:

General (5 matching dictionaries)

1. pentoxides: Merriam-Webster
2. pentoxides: Collins English Dictionary
3. pentoxides: Wiktionary
4. pentoxides: Dictionary.com
5. pentoxides: TheFreeDictionary.com

Computing (1 matching dictionary)

6. pentoxides: Encyclopedia

Medicine (1 matching dictionary)

7. pentoxides: Merriam-Webster Medical Dictionary

(Note: See pentoxide as well.)

Definitions from Wiktionary (pentoxide) ▸ noun:  (inorganic chemistry) any oxide containing five oxygen atoms in each molecule ▸ Also see pentoxide ▸ Words similar to pentoxides ▸ Usage examples for pentoxides ▸ Idioms related to pentoxides ▸ Wikipedia articles (New!) ▸ Popular adjectives describing pentoxides ▸ Words that often appear near pentoxides ▸ Rhymes of pentoxides ▸ Invented words related to pentoxides