원이나 구의 중심을 통과하며 양 끝이 경계에 닿는 직선 또는 그 길이.
A straight line segment that passes through the center of a circle or sphere and has its endpoints on the boundary, or the length of this segment.
예문:
"The engineer calculated the exact diameter of the pipe before ordering the fittings."
"If the radius of the circle is 5 centimeters, its diameter is 10 centimeters."
"We need to measure the diameter of the tree trunk at breast height."
렌즈나 망원경의 확대 능력을 나타내는 광학 측정 단위.
A unit of linear measurement used in optics to denote the magnifying power of a lens or telescope.
예문:
"The telescope offers a maximum magnifying power of 50 diameters."
"Microscopes are often rated by their maximum diameter, indicating how much they can enlarge an image."