The Collaborative International Dictionary of English v.0.48:

Pea \Pea\, n.; pl. Peas (p[=e]z) or Pease (p[=e]z). [OE.
   pese, fr. AS. pisa, or OF. peis, F. pois; both fr. L. pisum;
   cf. Gr. pi`sos, pi`son. The final s was misunderstood in
   English as a plural ending. Cf. Pease.]
   1. (Bot.) A plant, and its fruit, of the genus Pisum, of
      many varieties, much cultivated for food. It has a
      papilionaceous flower, and the pericarp is a legume,
      popularly called a pod.
      [1913 Webster]

   Note: When a definite number, more than one, is spoken of,
         the plural form peas is used; as, the pod contained
         nine peas; but, in a collective sense, the form pease
         is preferred; as, a bushel of pease; they had pease at
         dinner. This distinction is not always preserved, the
         form peas being used in both senses.
         [1913 Webster]

   2. A name given, especially in the Southern States, to the
      seed of several leguminous plants (species of Dolichos,
      Cicer, Abrus, etc.) esp. those having a scar (hilum)
      of a different color from the rest of the seed.
      [1913 Webster]

   Note: The name pea is given to many leguminous plants more or
         less closely related to the common pea. See the
         Phrases, below.
         [1913 Webster]

   Beach pea (Bot.), a seashore plant, Lathyrus maritimus.


   Black-eyed pea, a West Indian name for Dolichos
      sph[ae]rospermus and its seed.

   Butterfly pea, the American plant Clitoria Mariana,
      having showy blossoms.

   Chick pea. See Chick-pea.

   Egyptian pea. Same as Chick-pea.

   Everlasting pea. See under Everlasting.

   Glory pea. See under Glory, n.

   Hoary pea, any plant of the genus Tephrosia; goat's rue.


   Issue pea, Orris pea. (Med.) See under Issue, and
      Orris.

   Milk pea. (Bot.) See under Milk.

   Pea berry, a kind of a coffee bean or grain which grows
      single, and is round or pea-shaped; often used
      adjectively; as, pea-berry coffee.

   Pea bug. (Zool.) Same as Pea weevil.

   Pea coal, a size of coal smaller than nut coal.

   Pea crab (Zool.), any small crab of the genus
      Pinnotheres, living as a commensal in bivalves; esp.,
      the European species (Pinnotheres pisum) which lives in
      the common mussel and the cockle.

   Pea dove (Zool.), the American ground dove.

   Pea-flower tribe (Bot.), a suborder (Papilionace[ae]) of
      leguminous plants having blossoms essentially like that of
      the pea. --G. Bentham.

   Pea maggot (Zool.), the larva of a European moth (Tortrix
      pisi), which is very destructive to peas.

   Pea ore (Min.), argillaceous oxide of iron, occurring in
      round grains of a size of a pea; pisolitic ore.

   Pea starch, the starch or flour of the common pea, which is
      sometimes used in adulterating wheat flour, pepper, etc.


   Pea tree (Bot.), the name of several leguminous shrubs of
      the genus Caragana, natives of Siberia and China.

   Pea vine. (Bot.)
      (a) Any plant which bears peas.
      (b) A kind of vetch or tare, common in the United States
          (Lathyrus Americana, and other similar species).

   Pea weevil (Zool.), a small weevil (Bruchus pisi) which
      destroys peas by eating out the interior.

   Pigeon pea. (Bot.) See Pigeon pea.

   Sweet pea (Bot.), the annual plant Lathyrus odoratus;
      also, its many-colored, sweet-scented blossoms.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Milk \Milk\ (m[i^]lk), n. [AS. meoluc, meoloc, meolc, milc; akin
   to OFries. meloc, D. melk, G. milch, OHG. miluh, Icel.
   mj[=o]lk, Sw. mj["o]lk, Dan. melk, Goth. miluks, G. melken to
   milk, OHG. melchan, Lith. milszti, L. mulgere, Gr.
   'ame`lgein. [root]107. Cf. Milch, Emulsion, Milt soft
   roe of fishes.]
   [1913 Webster]
   1. (Physiol.) A white fluid secreted by the mammary glands of
      female mammals for the nourishment of their young,
      consisting of minute globules of fat suspended in a
      solution of casein, albumin, milk sugar, and inorganic
      salts. "White as morne milk." --Chaucer.
      [1913 Webster]

   2. (Bot.) A kind of juice or sap, usually white in color,
      found in certain plants; latex. See Latex.
      [1913 Webster]

   3. An emulsion made by bruising seeds; as, the milk of
      almonds, produced by pounding almonds with sugar and
      water.
      [1913 Webster]

   4. (Zool.) The ripe, undischarged spat of an oyster.
      [1913 Webster]

   Condensed milk. See under Condense, v. t.

   Milk crust (Med.), vesicular eczema occurring on the face
      and scalp of nursing infants. See Eczema.

   Milk fever.
      (a) (Med.) A fever which accompanies or precedes the first
          lactation. It is usually transitory.
      (b) (Vet. Surg.) A form puerperal peritonitis in cattle;
          also, a variety of meningitis occurring in cows after
          calving.

   Milk glass, glass having a milky appearance.

   Milk knot (Med.), a hard lump forming in the breast of a
      nursing woman, due to obstruction to the flow of milk and
      congestion of the mammary glands.

   Milk leg (Med.), a swollen condition of the leg, usually in
      puerperal women, caused by an inflammation of veins, and
      characterized by a white appearance occasioned by an
      accumulation of serum and sometimes of pus in the cellular
      tissue.

   Milk meats, food made from milk, as butter and cheese.
      [Obs.] --Bailey.

   Milk mirror. Same as Escutcheon, 2.

   Milk molar (Anat.), one of the deciduous molar teeth which
      are shed and replaced by the premolars.

   Milk of lime (Chem.), a watery emulsion of calcium hydrate,
      produced by macerating quicklime in water.

   Milk parsley (Bot.), an umbelliferous plant (Peucedanum
      palustre) of Europe and Asia, having a milky juice.

   Milk pea (Bot.), a genus (Galactia) of leguminous and,
      usually, twining plants.

   Milk sickness (Med.), See milk sickness in the
      vocabulary.

   Milk snake (Zool.), a harmless American snake (Ophibolus
      triangulus, or Ophibolus eximius). It is variously
      marked with white, gray, and red. Called also milk
      adder, chicken snake, house snake, etc.

   Milk sugar. (Physiol. Chem.) See Lactose, and Sugar of
      milk (below).

   Milk thistle (Bot.), an esculent European thistle (Silybum
      marianum), having the veins of its leaves of a milky
      whiteness.

   Milk thrush. (Med.) See Thrush.

   Milk tooth (Anat.), one of the temporary first set of teeth
      in young mammals; in man there are twenty.

   Milk tree (Bot.), a tree yielding a milky juice, as the cow
      tree of South America (Brosimum Galactodendron), and the
      Euphorbia balsamifera of the Canaries, the milk of both
      of which is wholesome food.

   Milk vessel (Bot.), a special cell in the inner bark of a
      plant, or a series of cells, in which the milky juice is
      contained. See Latex.

   Rock milk. See Agaric mineral, under Agaric.

   Sugar of milk. The sugar characteristic of milk; a hard
      white crystalline slightly sweet substance obtained by
      evaporation of the whey of milk. It is used in pellets and
      powder as a vehicle for homeopathic medicines, and as an
      article of diet. See Lactose.
      [1913 Webster]