cleavage furrow

The band of microfilaments during cytokinesis in cell division that splits the two daughter cells' membranes in half. Biology teachers everywhere are laughed at after teaching this word during class.

Biology teacher: "And during cytokinesis, the cleavage furrow begins..."
John: "HAHA, she just said cleavage!"
Alex: "Yeah, haha, I love this class bro!"

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