noun
mast cell; mastocyte
A type of immune cell involved in allergic reactions and inflammation. Technical term used in biology and medicine.
肥満細胞はアレルギー反応に関与している。
Mast cells are involved in allergic reactions.
From 肥満 (himan, 'obesity') + 細胞 (saibō, 'cell'), a calque of German 'Mastzelle' (from 'Mast' meaning 'fattening' or 'mast'). The name reflects the cell's granular, plump appearance under a microscope.