noun
endoplasm
Biology term for the inner, granular part of the cytoplasm of a cell, especially in amoeboid cells.
アメーバの内部原形質は顆粒を多く含んでいる。
The endoplasm of an amoeba contains many granules.
外質 (ectoplasm) is the outer, clearer layer of cytoplasm, contrasting with the inner granular endoplasm.
Compound of 内部 (ないぶ, 'interior') + 原形質 (げんけいしつ, 'protoplasm'). The term is a direct calque from the biological concept of endoplasm.