| 单词 | rod |
| 释义 | rod [räd] DESIGN ENGINEERING 1. A bar whose end is slotted, tapered, or screwed for the attachment of a drill bit. 2. A thin, round bar of metal or wood. GEOLOGY A rodlike sedimentary particle characterized by a width-length ratio less than 2/3 and a thickness-width ratio more than 2/3. Also known as roller. HISTOLOGY One of the rod-shaped sensory bodies in the retina which are sensitive to dim light. MECHANICS See <<perch>> NUCLEONICS A relatively long and slender body of material used in, or in conjunction with, a nuclear reactor; may contain fuel, absorber, or fertile material or other material in which activation or transmutation is desired. |
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