受精卵|じゅせいらんjuseiran[2]nakadaka (mid-high)

1. nounfertilized egg; fertilised egg

• Related胎児たいじNeutralNeutral. The growing young inside the mother from when organ formation is complete until birth; 「受精卵」 is the earliest stage of development.
• Related胎芽たいがWrittenWritten/formal prose. An early embryo whose organs have begun to form; 「受精卵」 is the egg formed at fertilization, marking the starting point of development.
• Related胚はいWrittenWritten/formal prose. The embryo at the very start of development in a multicellular organism; 「受精卵」 stresses the egg newly formed by fertilization.

The egg formed by fertilization, including its earliest dividing stage, is 「受精卵」, as in 「受精卵の着床」. For the developing early embryo use 「胚」, or 「胎芽」 once organs start to form; 「胎児」 covers the stage after organ formation up to birth.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 受精じゅせいした卵たまご。