apertometer

[ ap-er-tom-i-ter ]

/ ˌæp ərˈtɒm ɪ tər /

Save This Word!

noun Optics.

an instrument for measuring the angular and numerical aperture of the objective lens of a microscope.

QUIZ

CAN YOU ANSWER THESE COMMON GRAMMAR DEBATES?

There are grammar debates that never die; and the ones highlighted in the questions in this quiz are sure to rile everyone up once again. Do you know how to answer the questions that cause some of the greatest grammar debates?

Question 1 of 7

Which sentence is correct?

His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

TAKE THE QUIZ TO FIND OUT

Origin of apertometer

First recorded in 1875–80; apert(ure) + -o- + -meter

Words nearby apertometer

aperçu, aperient, aperiodic, apéritif, aperitive, apertometer, aperture, aperture card, aperture-priority, aperture synthesis, apery