any of several huge clams of the family Tridacnidae, inhabiting the shallow waters of coral reefs in the tropical Indo-Pacific, as Tridacna gigas: some may weigh more than 500 pounds (225 kg).
- Giant cell tumor of tendon sheath
giant cell tumor of tendon sheath n. A nodule, possibly inflammatory, that usually develops from the flexor sheath of the fingers and thumb and is composed of fibrous tissue, multinucleated giant cells, and lipid- and hemosiderin-containing macrophages. Also called localized nodular tenosynovitis.
- Giant cell tumor of bone
giant cell tumor of bone n. A sometimes malignant osteolytic tumor composed of multinucleated giant cells and ovoid or spindle-shaped cells. It occurs most frequently in an end of a long tubular bone. Also called giant cell myeloma, osteoclastoma.
- Giant cell sarcoma
giant cell sarcoma n. A malignant giant cell tumor of bone.
[gift] /gɪft/ noun 1. something voluntarily without payment in return, as to show favor toward someone, honor an occasion, or make a gesture of assistance; present. 2. the act of . 3. something bestowed or acquired without any particular effort by the recipient or without its being earned: Those extra points he got in the […]