资料来源 : pyDict

始祖,祖先

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Primogenitor \Pri`mo*gen"i*tor\, n. [LL., fr. L. primus first +
   genitor a begetter.]
   The first ancestor; a forefather.

资料来源 : WordNet®

primogenitor
     n : an ancestor in the direct line [syn: {progenitor}]