| 释义 |
impermeable, a.|ɪmˈpɜːmiːəb(ə)l|
[a. F. imperméable (Rabelais), or ad. late L. impermeābil-is, f. im- (im-2) + permeābilis permeable.]
Not permeable.
1. That cannot be passed through or traversed; impassable.
1697Evelyn Numism. iv. 160 Attempts to discover the Nor-West and other hitherto impermeable Passages. 1808J. Barlow Columb. ix. 466 Between them stretch'd the impermeable main. 1854Hawthorne Eng. Note-Bks. (1879) II. 350 Charing Cross..became absolutely impermeable.
2. Physics. That does not permit the passage of water or other fluid, liquid or gaseous.
1752Watson in Phil. Trans. XLVII. 554 To demonstrate, that glass is not absolutely impermeable to the electric fluid. 1827H. Steuart Planter's G. (1828) 205 A bed of hard and impermeable clay. 1878Huxley Physiogr. 21 Those [rocks] which refuse to allow water to soak in are said to be impermeable.
Hence imˈpermeableness, the quality of being impermeable, impermeability; imˈpermeably adv., in an impermeable manner.
1846Worcester, Impermeably. Dr. Allen. 1847Craig, Impermeableness. |