二に卵らん性せい双そう生せい児じ

noun

fraternal twins

Medical/biological term for twins from two separate fertilized eggs; contrast with 一卵性双生児 (identical twins).

• 二に卵らん性せい双そう生せい児じは遺い伝でん的てきに普ふ通つうの兄きょう弟だいと同おなじくらい似にている。

  Fraternal twins are as genetically similar as ordinary siblings.