[1] : The Collaborative International Dictionary of English v.0.48

sensitive \sen"sitive\, a. f. sensitif. see sense.
   1. having sense of feeling; possessing or exhibiting the
      capacity of receiving impressions from external objects;
      as, a sensitive soul.
      1913 webster

   2. having quick and acute sensibility, either to the action
      of external objects, or to impressions upon the mind and
      feelings; highly susceptible; easily and acutely affected.
      1913 webster

            she was too sensitive to abuse and calumny.
                                                  --macaulay.
      1913 webster

   3.
      a mech. having a capacity of being easily affected or
          moved; as, a sensitive thermometer; sensitive scales.
      b chem.  photog. readily affected or changed by
          certain appropriate agents; as, silver chloride or
          bromide, when in contact with certain organic
          substances, is extremely sensitive to actinic rays.
          1913 webster

   4. serving to affect the sense; sensible. r.
      1913 webster

            a sensitive love of some sensitive objects.
                                                  --hammond.
      1913 webster

   5. of or pertaining to sensation; depending on sensation; as,
      sensitive motions; sensitive muscular motions excited by
      irritation. --e. darwin.
      1913 webster

   sensitive fern bot., an american fern onoclea
      sensibilis, the leaves of which, when plucked, show a
      slight tendency to fold together.

   sensitive flame physics, a gas flame so arranged that
      under a suitable adjustment of pressure it is exceedingly
      sensitive to sounds, being caused to roar, flare, or
      become suddenly shortened or extinguished, by slight
      sounds of the proper pitch.

   sensitive joint vetch bot., an annual leguminous herb
      aeschynomene hispida, with sensitive foliage.

   sensitive paper, paper prepared for photographic purpose by
      being rendered sensitive to the effect of light.

   sensitive plant. bot.
      a a leguminous plant mimosa pudica, or mimosa
          sensitiva, and other allied species, the leaves of
          which close at the slightest touch.
      b any plant showing motions after irritation, as the
          sensitive brier schrankia of the southern states,
          two common american species of cassia cassia
          nictitans, and cassia chamaecrista, a kind of
          sorrel oxalis sensitiva, etc.
          1913 webster -- sen"sitively, adv. --
          sen"sitiveness, n.
          1913 webster
see also:
sense sensitive fern onoclea sensibilis sensitive flame sensitive joint vetch aeschynomene hispida 
sensitive paper sensitive plant mimosa pudica mimosa sensitiva schrankia 
cassia cassia nictitans cassia chamaecrista oxalis sensitiva sen"sitively 
sen"sitiveness 

[2] : WordNet (r) 2.0

sensitive plant
     n 1: prostrate or semi-erect subshrub of tropical america, and
          australia; heavily armed with recurved thorns and having
          sensitive soft gray-green leaflets that fold and droop
          at night or when touched or cooled syn: touch-me-not,
           shame plant, live-and-die, humble plant, action
          plant, mimosa pudica
     2: semi-climbing prickly evergreen shrub of tropical america
        having compound leaves sensitive to light and touch syn:
        mimosa sensitiva
see also:
touch-me-not shame plant live-and-die humble plant action plant mimosa pudica 
mimosa sensitiva 

Plant >> P Words
Plant, definition of term: Plant
plant_pag1.html

Plant Hopper >> P Words
Plant Hopper, definition of term: Plant Hopper
plant+hopper_pag1.html

Plant Life >> P Words
Plant Life, definition of term: Plant Life
plant+life_pag1.html

Air Plant >> A Words
Air Plant, definition of term: Air Plant
air+plant_pag1.html

Indigo Plant >> I Words
Indigo Plant, definition of term: Indigo Plant
indigo+plant_pag1.html

Aquatic Plant >> A Words
Aquatic Plant, definition of term: Aquatic Plant
aquatic+plant_pag1.html

Case Sensitive >> C Words
Case Sensitive, definition of term: Case Sensitive
case+sensitive_pag1.html

Century Plant >> C Words
Century Plant, definition of term: Century Plant
century+plant_pag1.html

Jumping Plant L >> J Words
Jumping Plant L, definition of term: Jumping Plant L
jumping+plant+l_pag1.html