an optical system consisting of two or more lenses having the same axis.
a lens consisting of more than one component lens
noun 1. a magnet consisting of two or more separate magnets placed together with like poles pointing in the same direction.
noun 1. an optical instrument for forming magnified images of small objects, consisting of an objective lens with a very short focal length and an eyepiece with a longer focal length, both lenses mounted in the same tube. noun 1. an instrument for magnifying small objects, consisting of a lens of short focal length for […]
- Compound myopic astigmatism
compound myopic astigmatism n. Astigmatism in which all meridians are myopic to different degrees.
noun 1. a quantity expressed in more than one denomination or unit, as one foot six inches or one minute twenty seconds. noun 1. a quantity expressed in two or more different but related units: 3 hours 10 seconds is a compound number