transilluminatev.
/trɑːnzᵻˈl(j)uːmᵻneɪt/, /tranzᵻˈl(j)uːmᵻneɪt/, /trɑːnsᵻˈl(j)uːmᵻneɪt/, /transᵻˈl(j)uːmᵻneɪt/, U.S. /ˌtrænzəˈluməˌneɪt/, /ˌtræn(t)səˈluməˌneɪt/ transitive. To pass light through (something), esp. as a method of medical or scientific investigation; to perform transillumination upon. In later use also intransitive: to admit of transillumination.
ΘΚΠ
the world > health and disease > healing > diagnosis or prognosis > examination > examine medically [verb (transitive)] > pass light through
transilluminate1890
1890 N.Y. Med. Jrnl. 20 Dec. 697/1 An instrument for transilluminating the larynx with an electric lamp.
1916 N.Y. Med. Jrnl. 20 May 963/2 The tonsil lights up in much the same way as does a stained glass window brilliantly transilluminated from the opposite side.
1969 Stud. Conservation 14 21 (caption) Like age cracks, mechanical cracks penetrate both paint and ground and are visible when transilluminated.
2016 Daily Mail (Nexis) 15 Nov. If the swelling is solid, it will not transilluminate.
This entry has been updated (OED Third Edition, March 2019; most recently modified version published online March 2022).
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