We found 6 dictionaries that define the word cirrus clouds:

General (3 matching dictionaries)

1. cirrus clouds: Vocabulary.com
2. cirrus clouds: Dictionary.com
3. Cirrus clouds: Wikipedia, the Free Encyclopedia

Computing (1 matching dictionary)

4. Cirrus clouds: Encyclopedia

Science (1 matching dictionary)

5. Atmospheric Chemistry and Air Quality (No longer online)

Tech (1 matching dictionary)

6. Lake and Water Word Glossary (No longer online)

(Note: See cirrus_cloud as well.)

Definitions from Wikipedia (Cirrus cloud) ▸ noun:  Cirrus (cloud classification symbol: Ci) is a genus of high cloud made of ice crystals. ▸ Also see cirrus_cloud ▸ Words similar to cirrus clouds ▸ Usage examples for cirrus clouds ▸ Idioms related to cirrus clouds ▸ Wikipedia articles (New!) ▸ Words that often appear near cirrus clouds ▸ Rhymes of cirrus clouds ▸ Invented words related to cirrus clouds