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uptake (n.)

"capacity for understanding, perceptive power," 1816, from up (adv.) + take (v.). Compare Middle English verb uptake "to pick or take up" (c. 1300). Meaning "pipe leading up from the smoke box of a steam boiler to the chimney" is from 1839.

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Definitions of uptake from WordNet

uptake (n.)
the process of taking food into the body through the mouth (as by eating);
uptake (n.)
a process of taking up or using up or consuming;
they developed paper napkins with a greater uptake of liquids
From wordnet.princeton.edu