housing (1) Look up housing at Dictionary.com
"buildings, lodgings," c.1300, husing, from the root of house.
housing (2) Look up housing at Dictionary.com
"ornamental covering," 1312, houce "covering for the back and flanks of a horse," from M.L. hultia, from Frank. *khulfti (cf. M.Du. hulfte "pocket for bow and arrow," M.H.G. hulft "covering"). Sense of "case or enclosure for machine or part" is first recorded 1882.