The Collaborative International Dictionary of English v.0.48:

Egg \Egg\ ([e^]g), n. [OE., fr. Icel. egg; akin to AS. [ae]g
   (whence OE. ey), Sw. [aum]gg, Dan. [ae]g, G. & D. ei, and
   prob. to OSlav. aje, jaje, L. ovum, Gr. 'w,o`n, Ir. ugh,
   Gael. ubh, and perh. to L. avis bird. Cf. Oval.]
   1. (Popularly) The oval or roundish body laid by domestic
      poultry and other birds, tortoises, etc. It consists of a
      yolk, usually surrounded by the "white" or albumen, and
      inclosed in a shell or strong membrane.
      [1913 Webster]

   2. (Biol.) A simple cell, from the development of which the
      young of animals are formed; ovum; germ cell.
      [1913 Webster]

   3. Anything resembling an egg in form.
      [1913 Webster]

   Note: Egg is used adjectively, or as the first part of
         self-explaining compounds; as, egg beater or
         egg-beater, egg case, egg ladle, egg-shaped, etc.
         [1913 Webster]

   Egg and anchor (Arch.), see egg-and-dart in the
      vocabulary, below; -- called also egg and dart, and egg
      and tongue. See Anchor, n., 5. --Ogilvie.

   Egg cleavage (Biol.), a process of cleavage or
      segmentation, by which the egg undergoes endogenous
      division with formation of a mass of nearly similar cells,
      from the growth and differentiation of which the new
      organism is ultimately formed. See Segmentation of the
      ovum, under Segmentation.

   Egg development (Biol.), the process of the development of
      an egg, by which the embryo is formed.

   Egg mite (Zo["o]l.), any mite which devours the eggs of
      insects, as Nothrus ovivorus, which destroys those of
      the canker worm.

   Egg parasite (Zo["o]l.), any small hymenopterous insect,
      which, in the larval stage, lives within the eggs of other
      insects. Many genera and species are known.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

egg-and-dart \egg-and-dart\, egg and dart \egg and dart\n.
   a decorative ovolo molding, having a series of egg-shaped
   figures alternating with another shape in the form of a dart
   or anchor. Also used attributively; as, an egg-and-dart
   molding; an egg-and-dart design. Called also egg and dart,
   and egg and tongue

   Syn: egg-and-anchor, egg and anchor, egg-and-tongue, egg and
        tongue.
        [WordNet 1.5]