To save this word, you'll need to log in.
Medical Definition of angular aperture
: the angle subtended at the principal focus of an optical system (as a microscope) by the diameter of its entrance for light
Comments on angular aperture
What made you want to look up angular aperture? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Semantic Drift Quiz
- Which of the following was once a synonym for fun?
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
Share angular aperture