| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| the offspring of a zebra and a donkey. |
pump (pŭmp)
n.
A machine or device for raising, compressing, or transferring fluids.
A molecular mechanism for the active transport of ions or molecules across a cell membrane.
To raise or cause to flow by means of a pump.
To transport ions or molecules against a concentration gradient by the expenditure of chemically stored energy.
pump (pŭmp) Pronunciation Key
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pump definition
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