a.

1. 母亲的；母性的
   She showed her daughter's picture with maternal pride.

   她怀着作为母亲的自豪感拿出女儿的照片给人看。

2. 母亲一方的；母系的
   maternal grandparents

   外祖父母

3. 母体遗传的
   maternal chromosomes

   母体遗传的染色体

adj.

1. relating to a mother.
   ▸associated with or typical of a mother; motherly.
2. related through the mother's side of the family:
   maternal grandparents.