transilluminate

verb

trans·​il·​lu·​mi·​nate ˌtran(t)s-ə-ˈlü-mə-ˌnāt 

ˌtranz-

transilluminated; transilluminating; transilluminates

transitive verb

: to cause light to pass through

especially : to pass light through (a body part) for medical examination

transillumination

ˌtran(t)s-ə-ˌlü-mə-ˈnā-shən 

ˌtranz-

noun

transilluminator

ˌtran(t)s-ə-ˈlü-mə-ˌnā-tər 

ˌtranz-

noun

Word History

First Known Use

1890, in the meaning defined above

Medical Definition

transilluminate

transitive verb

trans·​il·​lu·​mi·​nate ˌtran(t)s-ə-ˈlü-mə-ˌnāt, ˌtranz- 

transilluminated; transilluminating

: to cause light to pass through

especially : to pass light through (a body part) for medical examination