stratum

名词 n.
中文释义
英 /ˈstɹɑː.təm/|/ˈstɹeɪ.təm/    美 /ˈstɹeɪ.təm/|[ˈstɹeɪ.ɾəm]|/ˈstɹæt.əm/|[ˈstɹæɾ.əm]|/ˈstɹaː.təm/

英文释义

名词 n.
  1. One of several parallel horizontal layers of material arranged one on top of another.
    — It is built of alternate strata of brick and clay, and the sides correspond to the direction of the meridians and parallels.
  2. A layer of sedimentary rock having approximately the same composition throughout.
    — An illuminating article in a recent issue of the Eastern Region's Civil Engineering News points out that where coal is worked over a reasonably large area, it is not only the whole of the strata above the workings, but also an area beyond which is liable to subside at varying rates after the coal has been removed.
  3. Any of the regions of the atmosphere, such as the stratosphere, that occur as layers.
  4. A layer of tissue.
  5. A class of society composed of people with similar social, cultural, or economic status.
  6. A layer of vegetation, usually of similar height.
  7. The level of accuracy of a computer's clock, relative to others on the network.
    — Computers that synchronize themselves to the stratum 1 time servers are known as stratum 2 time servers if they allow others to synchronize to them, and so on.
  8. A historical layer of a language.

词形变化

strata plural stratums plural,rare

词汇关系

衍生词
adstratum crystallostratum epistratum lateral stratum mediostratum midstratum overstratum phylostratum spongiostratum stratal stratarchy stratigraphic stratigraphy stratinomy stratum album intermediale stratum basale stratum corneum stratum germinativum stratum granulosum stratum griseum intermediale stratum lemnisci stratum spinosum substratum superstratum understratum
相关词
stratification stratify stratosphere

词源

Borrowed from Latin strātum (“a spread for a bed, coverlet, quilt, blanket; a pillow, bolster; a bed”), neuter singular of strātus, perfect passive participle of sternō (“spread”). Doublet of estrade and street.
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