滋养层

trophoblastic layer (attaches fertilized ovum to the uterus) / trophoderm

to raise (animals) / to bring up (children) / to keep (pets) / to support / to give birth

to pile on top of one another / layer; stratum / floor (of a building); story / (math.) sheaf / classifier for layers

to grow / to nourish / to increase / to cause / juice / taste / (dialect) to spout / to spurt

to nourish