名詞 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.（名詞）
【復(fù)數(shù)】 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.
原腸胚：一種囊胚之后的胚胎，含有中空、兩層的外胚層和內(nèi)胚層，包圍著通過(guò)胚孔跟外界交流的原腸

來(lái)源：
New Latin
現(xiàn)代拉丁語(yǔ)
Greek gastôr gastr- [belly]
希臘語(yǔ) gastôr gastr- [胃]
Latin -ula [feminine diminutive suff.]
拉丁語(yǔ) -ula [雌性的，可縮小的后綴]

【引伸】
gas.trular