the GNU version of the Collaborative International Dictionary of English
n. A tumor having the structure of a sarcoma in which there is a deposit of bone; sarcoma connected with bone.
The Century Dictionary and Cyclopedia
n. A tumor composed of intermingled bony and sarcomatous tissue.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. malignant bone tumor; most common in children and young adults where it tends to affect the femur
Word Usage
"If osteosarcoma is suspected based on X-rays or other imaging tests, a sample of the tumor (a biopsy) will be examined under the microscope to confirm the diagnosis."