revolving nosepiece

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• nosepiece — A microscope attachment, consisting of several objectives surrounding a central pivot. * * * nose·piece nōz .pēs n 1) the end piece of a microscope body to which an objective is attached and which often consists of a revolving holder for two or… …   Medical dictionary

• Nikon Instruments — is a division of the Nikon Corporation, which is headquartered in Tokyo, while its US operations are based in Melville, New York, and its European operations in Amstelveen, The Netherlands. Nikon Instruments is a market leader[citation needed] in …   Wikipedia