(n.) The diaphragm used in optical instruments to cut off the marginal portions of a beam of light passing through lenses.
STOP (18)
Meaning of STOP (18) in English
Webster's English dictionary. Английский словарь Webster. 2012
(n.) The diaphragm used in optical instruments to cut off the marginal portions of a beam of light passing through lenses.
Webster's English dictionary. Английский словарь Webster. 2012