| 单词 | air pore |
| 释义 | > as lemmasair pore air pore n. a pore or air-filled pocket in a surface or material; (Botany) a stoma in a leaf; a similar structure in the thallus or receptacle of certain liverworts. ΚΠ 1813 Mem. Literary & Philos. Soc. Manch. 2nd Ser. 2 22 There must then be air pores with valves opening outwards to permit the escape, but bar the entrance of any gas. 1839 J. Lindley School Bot. ix. 151 Ætheogams, plants furnished with air vessels and stomates or air pores. 1939 C. J. Hylander World of Plant Life vii. 94 Most common of all is the coarser thallus of a Marchantia or a Conocephalum, with its strikingly different upper surface. This is divided into angular areas in the center of each of which occurs an air pore. 2005 Cement & Concrete Res. 35 796/2 The air pores in aerated concrete are usually 0.1 to 1 mm in diameter. < as lemmas |
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