Meas·ur·ing, a. Used in, or adapted for, ascertaining measurements, or dividing by measure.
 Measuring faucet, a faucet which permits only a given quantity of liquid to pass each time it is opened, or one by means of which the liquid which passes can be measured.
 Measuring worm Zool., the larva of any geometrid moth.  They are so called because they move by a process in which they first pull the rear legs forward toward their front legs, forming a loop which resembles the process of measuring with a tape measure.  The motion is completed by subsequently moving the front legs forward to an advanced position. See Geometrid.

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 measuring worm
      n : small hairless caterpillar having legs on only its front and
          rear segments; mostly larvae of moths of the family
          Geometridae [syn: inchworm, looper]