alto-cumulus

1 definition found

alto-cumulus - Collaborative International Dictionary of English v.0.48 :

  Alto-cumulus \Al`to-cu"mu*lus\, n. [L. altus high + L. & E.
     cumulus.] (Meteor.)
     A fleecy cloud formation consisting of large whitish or
     grayish globular cloudlets with shaded portions, often
     grouped in flocks or rows.
     [Webster 1913 Suppl.]