collyrium

noun

col·​lyr·​i·​um kə-ˈlir-ē-əm 

plural collyria kə-ˈlir-ē-ə  or collyriums

: eyewash sense 1

Word History

Etymology

Middle English collirium, from Latin collyrium, from Greek kollyrion pessary, eye salve, from diminutive of kollyra roll of bread

First Known Use

14th century, in the meaning defined above

Medical Definition

collyrium

noun

col·​lyr·​i·​um kə-ˈlir-ē-əm 

plural collyria -ē-ə  or collyriums

: an eye lotion : eyewash