How To Spell altocumulus cloud?

Correct spelling: altocumulus cloud

What is the definition of altocumulus cloud?

  1. a cumulus cloud at an intermediate altitude of 2 or 3 miles

Google Ngram Viewer results for altocumulus cloud:

This graph shows how "altocumulus cloud" have occurred between 1800 and 2008 in a corpus of English books.