| hempa | <chemical> Hexamethylphosphoric triamide. Chemosterilant. According to the fourth annual report on carcinogens (ntp 85-002, 1985), this substance may reasonably be anticipated to be a carcinogen (merck, 11th ed). Pharmacological action: carcinogens, chemosterilants. Chemical name: Phosphoric triamide, hexamethyl- (12 Dec 1998) |
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| HEMPAS | <abbreviation> Hereditary erythroblastic multinuclearity associated with positive acidified serum. See: HEMPAS cells. (05 Mar 2000) |
| HEMPAS cells | The abnormal erythrocytes of type II congenital dyserythropoietic anaemia. See: HEMPAS. (05 Mar 2000) |