Definition of phaeodium in US English:

phaeodium

noun

Zoology
  • The dark mass surrounding the largest pore in the central capsule of a phaeodarian radiolarian, consisting of pigmented granules.

Origin

Late 19th century; earliest use found in Nature: a weekly journal of science. From scientific Latin phaeodium from ancient Greek ϕαιός grey + scientific Latin -odium.

Pronunciation

phaeodium

/fiːˈəʊdɪəm/