any of several small, striped, terrestrial squirrels of the genera Tamias, of North America, and Eutamia, of Asia and North America, especially T. striatus, of eastern North America.
Origin: 1825–35, Americanism; assimilated variant of earlier chitmunk, apparently < Ojibwaačitamo·nʔ red squirrel, equivalent to ačit- headfirst, face-down + derivational elements; so called from the squirrel's manner of descending trees
any burrowing sciurine rodent of the genera Tamias of E North America and Eutamias of W North America and Asia, typically having black-striped yellowish fur and cheek pouches for storing food
[C19: of Algonquian origin; compare Ojibwa atchitamon squirrel, literally: headfirst, referring to its method of descent from trees]
1841, from Algonquian, probably Ojibwa ajidamoo (in the Ottawa dialect ajidamoonh) "red squirrel," lit. "one who descends trees headlong" (containing ajid- "upside down"), probably infl. by Eng. chip and mink.