Definition of mesochile in US English:

mesochile

(also mesochil)

noun

Botany
  • In an orchid flower: the middle part of any labellum divided into distinct sections.

Origin

Mid 19th century; earliest use found in John Lindley (1799–1865), botanist and horticulturist. Shortened from mesochilium; compare hypochil.

Pronunciation

mesochile

/ˈmɛsə(ʊ)kʌɪl/