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Wiktionary
polymastia

n. The fact or condition of having more than two mammae or nipples.

Wikipedia
Polymastia

Polymastia may refer to:

  • Accessory breasts
  • Polymastia (sponge), a genus of sponge
Polymastia (sponge)

Polymastia is a genus of sponges ( Porifera) containing about 30 species. These are small to large encrusting or dome-shaped sponges with a smooth surface having many teat-shaped projections ( papillae). In areas of strong wave action, this genus does not grow the teat structures, but instead grows in a corrugated form.

The image depicts Polymastia pachymastia, often called "aggregated nipple sponge", a species found off the coast of northern California.

Its species include:

  • Polymastia agglutinans
  • Polymastia aurantium
  • Polymastia bicolor
  • Polymastia boletiformis
  • Polymastia bursa
  • Polymastia conigera
  • Polymastia crassa
  • Polymastia craticia
  • Polymastia croceus
  • Polymastia echinus
  • Polymastia fusca
  • Polymastia granulosa
  • Polymastia grimaldi
  • Polymastia hirsuta
  • Polymastia inflata
  • Polymastia invaginata
  • Polymastia isidis
  • Polymastia lorum
  • Polymastia mamillaris
  • Polymastia massilis
  • Polymastia megasclera
  • Polymastia mespilus
  • Polymastia penicillus
  • Polymastia pepo
  • Polymastia rubens
  • Polymastia spinula
  • Polymastia tapetum
  • Polymastia thielei
  • Polymastia uberrima
  • Polymastia umbraculum
  • Polymastia zitteli