Definition of placodioid in English:

placodioid

adjective

Botany
  • Of a crustose lichen thallus: more or less disc-shaped, with lobes around the edge; (of a lichen) having such a thallus.

Origin

Early 20th century. From scientific Latin Placodium, genus name + -oid.

Pronunciation

placodioid

/pləˈkəʊdɪɔɪd/