primon.(合奏或合唱的)主唱或主奏adj.第一的；卓越的adv.第一；首先primordium of thymus胸腺原基primordium production原基生产Primovula dautzenbergin.梨形原梭螺primoridial germ cells原始生殖细胞primordium of neopallium新皮层(质)原基primo-secondary suture两次缝(合)术primogenitary succession长子优先继承primordisl endoderm cells[医] 原内胚层细胞primordium of palatine tonsil腭扁桃体原基primordium of parathyroid gland甲状旁腺原基