The Collaborative International Dictionary of English v.0.48:

Pink \Pink\, n. [Perh. akin to pick; as if the edges of the
   petals were picked out. Cf. Pink, v. t.]
   1. (Bot.) A name given to several plants of the
      caryophyllaceous genus Dianthus, and to their flowers,
      which are sometimes very fragrant and often double in
      cultivated varieties. The species are mostly perennial
      herbs, with opposite linear leaves, and handsome
      five-petaled flowers with a tubular calyx.
      [1913 Webster]

   2. A color resulting from the combination of a pure vivid red
      with more or less white; -- so called from the common
      color of the flower. --Dryden.
      [1913 Webster]

   3. Anything supremely excellent; the embodiment or perfection
      of something. "The very pink of courtesy." --Shak.
      [1913 Webster]

   4. (Zool.) The European minnow; -- so called from the color
      of its abdomen in summer. [Prov. Eng.]
      [1913 Webster]

   Bunch pink is Dianthus barbatus.

   China pink, or Indian pink. See under China.

   Clove pink is Dianthus Caryophyllus, the stock from which
      carnations are derived.

   Garden pink. See Pheasant's eye.

   Meadow pink is applied to Dianthus deltoides; also, to
      the ragged robin.

   Maiden pink, Dianthus deltoides.

   Moss pink. See under Moss.

   Pink needle, the pin grass; -- so called from the long,
      tapering points of the carpels. See Alfilaria.

   Sea pink. See Thrift.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

maiden pink \maiden pink\ n.
   A low-growing loosely mat-forming Eurasian pink (Dianthus
   deltoides) with single crimson-eyed pale pink flowers.
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

Dianthus deltoides
    n 1: low-growing loosely mat-forming Eurasian pink with a single
         pale pink flower with a crimson center [syn: maiden pink,
         Dianthus deltoides]