| 单词 |
ground-plate |
| 释义 |
ground-plate
[Cf. Du. grondplaat, G. grundplatte.]
1. The lowest horizontal timber in a framing; a ground-sill.
1663Gerbier Counsel 67 Ground plates nine inches one way. 1679Moxon Mech. Exerc. I. 135 Plates..lying on the Foundation, are called Ground-plates. 1823P. Nicholson Pract. Build. 225 Ground-Plate or Sill.—The lowest plate of a wooden building for supporting the principal and other posts.
2. a. A bed-plate carrying railway sleepers or ties (Knight Dict. Mech. 1875).
b. A piece of flattened metal on which anything is fixed, as in a spectroscope.
1871tr. Schellen's Spectr. Anal. xxvii. 94 Of the prisms,..the first only is fastened to the ground-plate PP.
c. Electr. A metal plate sunk in the ground and connecting an electric current with the earth.
1875in Knight Dict. Mech. 1893in Sloane Stand. Electr. Dict.
3. Anat. (See quot.)
1882Quain's Anat. (ed. 9) II. 65 According to Klein..each connective tissue corpuscle is composed of two distinct substances: (a) a hyaline plate—ground-plate—which contains the oval nucleus..; and (b) a second substance. |
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