oil-immersion
adjective
(attributive) (of a lens or microscope) having a layer of oil between the objective and the specimen so as to increase the numerical aperture.
Origin
Late 19th century; earliest use found in Nature: a weekly journal of science.
- Regt
- reguide
- regula
- regulable
- regulant
- regular
- Regular Baptist
- regular-built
- regular canon
- regular expression
- fiscal
- fiscal cliff
- fiscal drag
- fiscal engineering
- fiscal envelope
- fiscality
- fiscally
- fiscal shrike
- fiscal year
- Fischer, Bobby
- Fischer-Dieskau, Dietrich
- Fischer, Emil Hermann
- Fischer, Hans
- fish
- fishable