Plural of cohesion; multiple instances of sticking together or forming unified wholes.
From cohesion + -s plural. The noun cohesion itself comes from Latin cohaesio, developing in the 1600s as physics needed language to describe attractive forces.
In surface chemistry, scientists study 'cohesions' between different molecules—water cohesions are so strong that capillary action can make plants pull water up against gravity, basically giving trees an invisible elevator.
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