单词 levonorgestrel 释义 levonorgestrel, n. Pharm.|livndstrl|[f. levo- + norgestrel n.]The laevorotatory isomer of norgestrel, with similar uses.1977Approved Names 1973 (Brit. Pharmacopia Comm.) Suppl. vii, Levonorgestrel, (-)-13-ethyl-17-hydroxy-18,19-d...