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

pea \pea\, n.; pl. peas p=ez or pease p=ez. 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
      sphaerospermus 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 papilionaceae 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
see also:
peas pease pisum dolichos cicer abrus 
beach pea lathyrus maritimus black-eyed pea dolichos sphaerospermus butterfly pea 
clitoria mariana chick pea chick-pea egyptian pea everlasting pea 
everlasting glory pea glory hoary pea tephrosia 
issue pea orris pea issue orris milk pea 
milk pea berry pea bug pea weevil pea coal 
pea crab pinnotheres pinnotheres pisum pea dove pea-flower tribe 
papilionaceae pea maggot tortrix pisi pea ore pea starch 
pea tree caragana pea vine lathyrus americana bruchus pisi 
pigeon pea sweet pea lathyrus odoratus 

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

pigeon \pi"geon\, n. f., fr. l. pipio a young pipping or
   chirping bird, fr. pipire to peep, chirp. cf. peep to
   chirp.
   1. zool. any bird of the order columbae, of which
      numerous species occur in nearly all parts of the world.
      1913 webster

   note: the common domestic pigeon, or dove, was derived from
         the old world rock pigeon or rock dove columba
         livia, common in cities. it has given rise to
         numerous very remarkable varieties, such as the
         carrier, fantail, nun, pouter, tumbler, etc. the common
         wild pigeon of the eastern united states is the
         mourning dove zenaida macroura, called also
         carolina dove. before the 19th century, the most
         common pigeon was the passenger pigeon, but that
         species is now extinct. see passenger pigeon, and
         carolina dove under dove. see, also, fruit
         pigeon, ground pigeon, queen pigeon, stock
         pigeon, under fruit, ground, etc.
         1913 webster +pjc

   2. an unsuspected victim of sharpers; a gull. slang
      1913 webster

   blue pigeon zool., an australian passerine bird
      graucalus melanops; -- called also black-faced crow.
      

   green pigeon zool., any one of numerous species of old
      world pigeons belonging to the family treronidae.

   imperial pigeon zool., any one of the large asiatic fruit
      pigeons of the genus carpophada.

   pigeon berry bot., the purplish black fruit of the
      pokeweed; also, the plant itself. see pokeweed.

   pigeon english perhaps a corruption of business english,
      an extraordinary and grotesque dialect, employed in the
      commercial cities of china, as the medium of communication
      between foreign merchants and the chinese. its base is
      english, with a mixture of portuguese and hindustani.
      --johnson's cyc.

   pigeon grass bot., a kind of foxtail grass setaria
      glauca, of some value as fodder. the seeds are eagerly
      eaten by pigeons and other birds.

   pigeon hawk. zool.
      a a small american falcon falco columbarius. the
          adult male is dark slate-blue above, streaked with
          black on the back; beneath, whitish or buff, streaked
          with brown. the tail is banded.
      b the american sharp-shinned hawk accipiter velox or
          accipiter fuscus.

   pigeon hole.
      a a hole for pigeons to enter a pigeon house.
      b see pigeonhole.
      c pl. an old english game, in which balls were rolled
          through little arches. --halliwell.

   pigeon house, a dovecote.

   pigeon pea bot., the seed of cajanus indicus; a kind of
      pulse used for food in the east and west indies; also, the
      plant itself.

   pigeon plum bot., the edible drupes of two west african
      species of chrysobalanus chrysobalanus ellipticus and
      chrysobalanus luteus.

   pigeon tremex. zool. see under tremex.

   pigeon wood bot., a name in the west indies for the wood
      of several very different kinds of trees, species of
      dipholis, diospyros, and coccoloba.

   pigeon woodpecker zool., the flicker.

   prairie pigeon. zool.
      a the upland plover.
      b the golden plover. local, u.s.
          1913 webster
see also:
peep columba livia mourning dove zenaida macroura carolina dove passenger pigeon 
dove fruit pigeon ground pigeon queen pigeon stock pigeon 
fruit ground blue pigeon graucalus melanops black-faced crow 
green pigeon treronidae imperial pigeon carpophada pigeon berry 
pokeweed pigeon english pigeon grass setaria glauca pigeon hawk 
falco columbarius accipiter velox accipiter fuscus pigeon hole pigeonhole 
pigeon house pigeon pea cajanus indicus pigeon plum chrysobalanus 
chrysobalanus ellipticus chrysobalanus luteus pigeon tremex tremex pigeon wood 
dipholis diospyros coccoloba pigeon woodpecker prairie pigeon 

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

angola pea \ango"la pea`\ bot.
   a tropical plant cajanus indicus and its edible seed, a
   kind of pulse; -- so called from angola in western africa.
   called also pigeon pea and congo pea.
   1913 webster
see also:
cajanus indicus pigeon pea congo pea 

[4] : WordNet (r) 2.0

pigeon pea
     n 1: tropical woody herb with showy yellow flowers and flat pods;
          much cultivated in the tropics syn: pigeon-pea plant,
           cajan pea, catjang pea, red gram, dhal, dahl,
           cajanus cajan
     2: small highly nutritious seed of the tropical pigeon-pea
        plant syn: cajan pea, dahl
see also:
pigeon-pea plant cajan pea catjang pea red gram dhal dahl 
cajanus cajan 

Chick Pea >> C Words
Chick Pea, definition of term: Chick Pea
chick+pea_pag1.html

Black-Eyed Pea >> B Words
Black-Eyed Pea, definition of term: Black-Eyed Pea
black-eyed+pea_pag1.html

Beach Pea >> B Words
Beach Pea, definition of term: Beach Pea
beach+pea_pag1.html