The Collaborative International Dictionary of English v.0.48:

Sea pink \Sea" pink`\ (Bot.)
   See Thrift.
   [1913 Webster]

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.
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   3. Anything supremely excellent; the embodiment or perfection
      of something. "The very pink of courtesy." --Shak.
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   4. (Zool.) The European minnow; -- so called from the color
      of its abdomen in summer. [Prov. Eng.]
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   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:

Thrift \Thrift\ (thr[i^]ft), n. [Icel. [thorn]rift. See
   Thrive.]
   1. A thriving state; good husbandry; economical management in
      regard to property; frugality.
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            The rest, . . . willing to fall to thrift, prove
            very good husbands.                   --Spenser.
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   2. Success and advance in the acquisition of property;
      increase of worldly goods; gain; prosperity. "Your thrift
      is gone full clean." --Chaucer.
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            I have a mind presages me such thrift. --Shak.
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   3. Vigorous growth, as of a plant.
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   4. (Bot.) One of several species of flowering plants of the
      genera Statice and Armeria.
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   Common thrift (Bot.), Armeria vulgaris; -- also called
      sea pink.
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   Syn: Frugality; economy; prosperity; gain; profit.
        [1913 Webster]

WordNet (r) 3.0 (2006):

sea pink
    n 1: tufted thrift of seacoasts and mountains of north temperate
         zone; occasionally grown as a ground cover [syn: cliff
         rose, sea pink, Armeria maritima]