| 释义 |
substage|ˈsʌbsteɪdʒ|
1. [sub- 7.] Geol. A subdivision of a stage.
1859Darwin Orig. Spec. ix. 297 If the specimens come from different sub-stages of the same [geological] formation. 1906Chamberlin & Salisbury Geol. III. 383 The following are the American stages of the glacial period now recognized in the interior of North America... The Champlain sub-stage (marine). The glacio-lacustrine sub-stage.
2. [sub- 3.] An apparatus fixed beneath the ordinary stage of a compound microscope for the purpose of supporting mirrors and other accessories. Also attrib.
1888Rutley Rock-Forming Min. 13 Generally speaking, a sub-stage is unnecessary. Ibid. 26 Examination by ordinary Transmitted Light (or Sub-stage Illumination). 1890Anthony's Photogr. Bull. III. 96 A substage illuminator or condenser. 1896Allbutt's Syst. Med. I. 506 Abbé's sub-stage-condenser. 1902Ross's Catal., Swing-out Substage. |