lobe

the word "lobe" entered english in the late 16th century via middle french "lobe," which itself derived from late latin "lobus." the latin term was a borrowing from the greek "lobós," meaning "a rounded projection or flap," such as an earlobe or a pod of a plant. the greek word is thought to be related to a root signifying something that hangs down or is pendulous. over time, the anatomical sense broadened from its initial reference to the earlobe to describe similarly shaped parts of internal organs, particularly the brain and lungs.

this word is a simplex loanword from latin via french. its spelling and form are not productively composed of smaller, recognizable english morphemes.