Definition of merismatoid in US English:

merismatoid

adjective

Mycology
  • Of a fungus, especially an agaric: having a pileus divided into many smaller pilei. Of the pileus of such a fungus: subdivided in this way.

Origin

1920s; earliest use found in Annals of the Missouri Botanical Garden. From Hellenistic Greek μέρισματ-, μέρισμα separated part + -oid.

Pronunciation

merismatoid

/mɪˈrɪzmətɔɪd/