| 单词 | primordium |
| 释义 | primordium /pruy mawr"dee euhm/, n. , pl. primordia /-dee euh/. Embryol. the first recognizable, histologically differentiated stage in the development of an organ. [1665-75; < L primordium, in pl.: beginnings, elementary stage, equiv. to prim(us) first (see PRIME) + ord(iri) to begin + -ium -IUM; cf. EXORDIUM] |
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