The Collaborative International Dictionary of English v.0.48:

Spanish \Span"ish\, a.
   Of or pertaining to Spain or the Spaniards.
   [1913 Webster]

   Spanish bayonet (Bot.), a liliaceous plant (Yucca
      alorifolia) with rigid spine-tipped leaves. The name is
      also applied to other similar plants of the Southwestern
      United States and mexico. Called also Spanish daggers.


   Spanish bean (Bot.) See the Note under Bean.

   Spanish black, a black pigment obtained by charring cork.
      --Ure.

   Spanish broom (Bot.), a leguminous shrub (Spartium
      junceum) having many green flexible rushlike twigs.

   Spanish brown, a species of earth used in painting, having
      a dark reddish brown color, due to the presence of
      sesquioxide of iron.

   Spanish buckeye (Bot.), a small tree (Ungnadia speciosa)
      of Texas, New Mexico, etc., related to the buckeye, but
      having pinnate leaves and a three-seeded fruit.

   Spanish burton (Naut.), a purchase composed of two single
      blocks. A

   double Spanish burton has one double and two single blocks.
      --Luce (Textbook of Seamanship).

   Spanish chalk (Min.), a kind of steatite; -- so called
      because obtained from Aragon in Spain.

   Spanish cress (Bot.), a cruciferous plant (Lepidium
      Cadamines), a species of peppergrass.

   Spanish curlew (Zool.), the long-billed curlew. [U.S.]

   Spanish daggers (Bot.) See Spanish bayonet.

   Spanish elm (Bot.), a large West Indian tree (Cordia
      Gerascanthus) furnishing hard and useful timber.

   Spanish feretto, a rich reddish brown pigment obtained by
      calcining copper and sulphur together in closed crucibles.


   Spanish flag (Zool.), the California rockfish
      (Sebastichthys rubrivinctus). It is conspicuously
      colored with bands of red and white.

   Spanish fly (Zool.), a brilliant green beetle, common in
      the south of Europe, used for raising blisters. See
      Blister beetle under Blister, and Cantharis.

   Spanish fox (Naut.), a yarn twisted against its lay.

   Spanish grass. (Bot.) See Esparto.

   Spanish juice (Bot.), licorice.

   Spanish leather. See Cordwain.

   Spanish mackerel. (Zool.)
   (a) A species of mackerel (Scomber colias) found both in
       Europe and America. In America called chub mackerel,
       big-eyed mackerel, and bull mackerel.
   (b) In the United States, a handsome mackerel having bright
       yellow round spots (Scomberomorus maculatus), highly
       esteemed as a food fish. The name is sometimes
       erroneously applied to other species. See Illust. under
       Mackerel.

   Spanish main, the name formerly given to the southern
      portion of the Caribbean Sea, together with the contiguous
      coast, embracing the route traversed by Spanish treasure
      ships from the New to the Old World.

   Spanish moss. (Bot.) See Tillandsia (and note at that
      entry).

   Spanish needles (Bot.), a composite weed (Bidens
      bipinnata) having achenia armed with needlelike awns.

   Spanish nut (Bot.), a bulbous plant (Iris Sisyrinchium)
      of the south of Europe.

   Spanish potato (Bot.), the sweet potato. See under
      Potato.

   Spanish red, an ocherous red pigment resembling Venetian
      red, but slightly yellower and warmer. --Fairholt.

   Spanish reef (Naut.), a knot tied in the head of a
      jib-headed sail.

   Spanish sheep (Zool.), a merino.

   Spanish white, an impalpable powder prepared from chalk by
      pulverizing and repeated washings, -- used as a white
      pigment.

   Spanish windlass (Naut.), a wooden roller, with a rope
      wound about it, into which a marline spike is thrust to
      serve as a lever.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Blister \Blis"ter\, n. [OE.; akin to OD. bluyster, fr. the same
   root as blast, bladder, blow. See Blow to eject wind.]
   1. A vesicle of the skin, containing watery matter or serum,
      whether occasioned by a burn or other injury, or by a
      vesicatory; a collection of serous fluid causing a
      bladderlike elevation of the cuticle.
      [1913 Webster]

            And painful blisters swelled my tender hands.
                                                  --Grainger.
      [1913 Webster]

   2. Any elevation made by the separation of the film or skin,
      as on plants; or by the swelling of the substance at the
      surface, as on steel.
      [1913 Webster]

   3. A vesicatory; a plaster of Spanish flies, or other matter,
      applied to raise a blister. --Dunglison.
      [1913 Webster]

   Blister beetle, a beetle used to raise blisters, esp. the
      Lytta vesicatoria (or Cantharis vesicatoria), called
      Cantharis or Spanish fly by druggists. See
      Cantharis.

   Blister fly, a blister beetle.

   Blister plaster, a plaster designed to raise a blister; --
      usually made of Spanish flies.

   Blister steel, crude steel formed from wrought iron by
      cementation; -- so called because of its blistered
      surface. Called also blistered steel.

   Blood blister. See under Blood.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cantharis \Can"tha*ris\ (k[a^]n"th[.a]*r[i^]s), n.; pl.
   Cantharides (k[a^]n*th[a^]r"[i^]*d[=e]z). [L., a kind of
   beetle, esp. the Spanish fly, Gr. kanqari`s.] (Zool.)
   A beetle (Lytta vesicatoria, syn. Cantharis vesicatoria),
   having an elongated cylindrical body of a brilliant green
   color, and a nauseous odor; the blister fly or blister
   beetle, of the apothecary; -- also called Spanish fly. Many
   other species of Lytta, used for the same purpose, take the
   same name. See Blister beetle, under Blister. The plural
   form in usually applied to the dried insects used in
   medicine.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Spanish fly
    n 1: green beetle of southern Europe