Definition of racemule in English:

racemule

Pronunciation /ˈrasɪmjuːl/

noun

rare Botany
  • A small raceme; (in later use) specifically a lateral branch of a panicle.

Origin

Late 18th century; earliest use found in Thomas Martyn (1735–1825), botanist. From scientific Latin racemulus from classical Latin racēmus + -ulus.