noun
blastocoel; segmentation cavity
A fluid-filled cavity that forms within the blastula during early embryonic development. Technical term used in embryology and developmental biology.
割腔は胞胚期に形成される。
The blastocoel forms during the blastula stage.
Synonym for blastocoel, also used in embryology. 割腔 is less common but carries the same meaning.
From 割 (division, splitting) + 腔 (cavity), referring to the cavity formed by cell division during early development. The exact historical derivation is uncertain; the spelling is conventionally associated with the biological meaning.