The Collaborative International Dictionary of English v.0.48:

latte \lat"te\ (l[.a]*t[=a]"), n.
   Same as cafe latte; a type of espresso coffee served with
   foamy steamed milk, and usually served in a tall glass or
   mug.
   [PJC]

The Collaborative International Dictionary of English v.0.48:

caf'e latte \ca`f['e]" lat"te\ (k[.a]`f[=a]"l[.a]*t[=a]"), n.
   A type of espresso coffee topped with foamy steamed milk, and
   usually served in a tall glass or mug; also called latte.
   [PJC] Cafenet

WordNet (r) 3.0 (2006):

latte
    n 1: strong espresso coffee with a topping of frothed steamed
         milk [syn: caffe latte, latte]