See Also: report 1, noun(dictionary)
relative 1, noun(dictionary)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
Medicine Lodge Memorial Hospital- Medicine Lodge(health)
Report(money)
law report(encyclopedia)
Report(finance)
report(2)(dictionary)
report(1)(dictionary)
Relative PE(money)

relative aperture (medicine) and report 1, noun (oh)


relative aperture (medicine)


relative aperture
<microscopy> The ratio of the focal length of a lens to the diameter of its entrance pupil. This gives a number known as the f-number, usually written f:8, f:16, etc. Thus, if the focal length is divided by the number 8, 16, etc., the result will be the diameter of the entrance pupil of the lens, or if the diaphragm of the lens is wide open it will be very nearly the diameter of the free aperture of the lens.

See: F-number.


report 1, noun (oh)



[Date: 1300-1400; Language: Old French; Origin: reporter 'to report', from Latin reportare, from portare 'to carry']
a written or spoken description of a situation or event, giving people the information they need
-see also account account report of/on/about
::Martens gave a report on his Sales trip to Korea.
a piece of Writing in a newspaper about something that is happening, or part of a news programme
-see also reporter reporter
::According to recent news reports , two of the victims are Americans.
report on/of
::media reports of the Food shortages
an official document that carefully considers a particular subject
report on
::a recent report on child Abuse
information that something has happened, which may or may not be true
report of
::Police received reports of a bomb threat at the airport at 11:28 p.m.
report that
::a report that he had been killed
BrE a written statement by teachers about a child's work at school, which is sent to his or her parents
American Equivalent: report card
BrE someone who works for a particular manager
::Only Gordon's direct reports are attending the course.
formal the noise of an explosion or shot
::a loud report