diaphragming

Verb

diaphragm (third-person singular simple present diaphragms, present participle diaphragming, simple past and past participle diaphragmed)

1. To reduce lens aperture using an optical diaphragm.
   • He employs an equatorial with an object-glass having a focal length of five metres, and which was diaphragmed down to eight centimetres.1870, D. Appleton & Co., Appletons' Annual Cyclopædia and Register of Important Events of the Year 1869, page 43
2. To act as a diaphragm, for example by vibrating.
   • The holes and burning are caused by the part diaphragming at 20000-40000 cycles/second.1996, Tom Drozda et al., Tool and Manufacturing Engineers Handbook, vol. VIII: Plastic Part Manufacturing, →ISBN, page 16-24

See all 10 meanings of diaphragm