ac·tive 'ak-tiv adj
1) capable of acting or reacting esp. in some specific way <an \active enzyme> <\active nitrogen>
2) tending to progress or to cause degeneration <\active tuberculosis>
3) exhibiting optical activity
4) requiring the expenditure of energy <\active calcium ion uptake>
ac·tive·ly adv
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ac·tive (akґtiv) characterized by action; not passive; not expectant.Medical dictionary. 2011.