#reproductive_cell__germ_cell__sex_cell__sexcell  a spermatozoon or an ovum
  supertype:  cell  the basic structural and functional unit of all organisms; cells may exist as independent units of life (as in monads) or may form colonies or tissues as in higher plants and animals
  part of:  reproductive_system
  subtype:  gamete  a mature sexual reproductive cell having a single set of unpaired chromosomes
     subtype:  anisogamete  either of a pair of unlike gametes especially those unlike in size
     subtype:  isogamete  either of a pair of conjugating gametes of the same size and structure
     subtype:  sperm_cell__spermcell__sperm__spermatozoon__spermatozoan  the male reproductive cell; the male gamete
     subtype:  ovum__egg_cell__eggcell  the female reproductive cell; the female gamete
        subtype:  egg  animal reproductive body consisting of an ovum or embryo together with nutritive and protective envelopes; especially the thin-shelled reproductive body laid by e.g. female birds
           subtype:  nit  egg or young of an insect parasitic on mammals especially a sucking louse; often attached to a hair or item of clothing
           subtype:  spawn  the mass of eggs deposited by fish or amphibians or molluscs
              subtype:  roe.spawn  the egg mass or spawn of certain crustaceans such as the lobster
           subtype:  roe  the eggs or egg-laden ovary of a fish
           subtype:  silkworm_seed  eggs of a silkworm
           subtype:  roe.egg  eggs of female fish
        subtype:  ootid  mature ovum after penetration by sperm but before the formation of a zygote
        subtype:  ovule.ovum  a small or immature ovum
     subtype:  spermatid  an immature gamete produced by a spermatocyte; develops into a spermatozoon
     subtype:  oosphere  used especially of lower plants
     subtype:  antherozoid__spermatozoid  a motile male gamete of a plant such as an alga or fern or gymnosperm

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