gastrula

名词 gastrula:

1. double-walled stage of the embryo resulting from invagination of the blastula; the outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm

gas.tru.la

n.（名词）
【复数】 gas.tru.las 或 gas.tru.lae [-lô.]
An embryo at the stage following the blastula, consisting of a hollow, two-layered sac of ectoderm and endoderm surrounding an archenteron that communicates with the exterior through the blastopore.
原肠胚：一种囊胚之后的胚胎，含有中空、两层的外胚层和内胚层，包围着通过胚孔跟外界交流的原肠

来源：
New Latin
现代拉丁语
Greek gastôr gastr- [belly]
希腊语 gastôr gastr- [胃]
Latin -ula [feminine diminutive suff.]
拉丁语 -ula [雌性的，可缩小的后缀]

【引伸】
gas.trular