mesochile
/ˈmɛsə(ʊ)kʌɪl/(also mesochil) Botany
noun
In an orchid flower: the middle part of a labellum which is divided into distinct sections.
Origin
Mid 19th century; earliest use found in John Lindley (1799–1865), botanist and horticulturist. Shortened from mesochilium; compare hypochil.