1Resembling (that of) tissue, especially loose connective tissue. In later use also: = histiocytoid .
2Designating a rare form of leprosy characterized by the presence of nodular lesions composed of spindle-shaped cells, and the lesions themselves; of or relating to this form of leprosy.
Mid 19th century; earliest use found in American Journal of the Medical Sciences. From ancient Greek ἱστός web + -oid.