- An abnormal nodule or small mass of overgrowth of bone, usually occurring bilaterally and symmetrically, in juxtaepiphysial regions, especially in long bones of the lower extremities; lesions are not actually neoplasms, but represent anomalous developments in which there are outpouchings of the cortex (in contrast to a growth superimposed on the cortex), and are more properly termed exostoses. [osteoma + G. eidos, appearance, form]
* * *os·te·o·ma·toid .äs-tē-'ō-mə-.tȯid adj resembling an osteoma
* * *os·teo·ma·toid (os″te-oґmə-toid) resembling an osteoma.
Medical dictionary. 2011.