| definitive callus | The callus which has become converted into osseous tissue. Synonym: permanent callus. (05 Mar 2000) |
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| definitive erythroblast | <haematology, pathology> Embryonic erythroblast found in the liver, smaller than primitive erythroblasts, they lose their nucleus at the end of the maturation cycle and produce erythrocytes with adult haemoglobin. (18 Nov 1997) |
| definitive host | <epidemiology> The host in which a parasite reproduces sexually. (05 Dec 1998) |
| definitive lysosomes | Lysosome's in which lysis takes place, owing to the activity of hydrolytic enzymes; they are believed to eventually become residual bodies. Synonym: definitive lysosomes, digestive vacuole. (05 Mar 2000) |
| definitive method | An analytical procedure for the measurement of a specified analyte in a specified material which is known to give essentially the true value for the concentration of the analyte. (05 Mar 2000) |
| definitive prosthesis | A dental prosthesis to be used over a prescribed period of time. (05 Mar 2000) |