alto-


variant of alti-: altostratus.
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British Dictionary definitions for alto-

alto-


combining form

highaltocumulus; altostratus

Word Origin for alto-

from Latin altus high
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012