triploid noun & adjective. ['trɪplɔɪd] M18.
[from TRIPLO- + -OID. In senses A.2, B. prob. from TRI- + -PLOID after diploid.]
A. noun.
1. Surgery. A three-branched instrument used to raise depressed bones of the cranium. rare. Only in M18.

2. Biology. A triploid cell or organism. E20.
b. adjective. Biology. (Of a cell) containing three homologous sets of chromosomes; (of an individual) composed of diploid cells. E20.

■ triploidy noun (Biology) triploid condition E20.

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