from the GNU version of the Collaborative International Dictionary of English
- n. A genus of ground squirrels, including the chipmunk.
from The Century Dictionary and Cyclopedia
- n. A genus of ground-squirrels, of the family Sciuridæ, connecting the Sciurinæ, or true arboreal squirrels, with the Spermophilinæ, or marmot-squirrels.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. chipmunks of eastern North America
Sorry, no etymologies found.
"flying" squirrels (_tamias_ and _pteromys_), the number of species might be more than forty.