A small cell or chamber; a minute compartment or cavity in an organism or structure.
From Latin cellula (small room, small cell), a diminutive of cella (room, chamber). This is the direct ancestor of the English word 'cell' and means a tiny enclosed space.
Cellule is the fancy scientific word for what's essentially a tiny room—it's Latin for 'little cell,' and biologists still use it when they want to sound especially precise about microscopic compartments, like the air sacs in beehives or insect wings.
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