Online Google Dictionary

erratic 中文解釋 wordnet sense Collocation Usage
Adjective
/iˈratik/,
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Not even or regular in pattern or movement; unpredictable,
  1. Not even or regular in pattern or movement; unpredictable
    • - her breathing was erratic
  2. Deviating from the normal or conventional in behavior or opinions
    • - neighbors were alarmed by increasingly erratic behavior
Noun
  1. A rock or boulder that differs from the surrounding rock and is believed to have been brought from a distance by glacial action


  1. liable to sudden unpredictable change; "erratic behavior"; "fickle weather"; "mercurial twists of temperament"; "a quicksilver character, cool and willful at one moment, utterly fragile the next"
  2. having no fixed course; "an erratic comet"; "his life followed a wandering course"; "a planetary vagabond"
  3. likely to perform unpredictably; "erratic winds are the bane of a sailor"; "a temperamental motor; sometimes it would start and sometimes it wouldn't"; "that beautiful but temperamental instrument the flute"- Osbert Lancaster
  4. (erratically) in an erratic unpredictable manner; "economic changes are proceeding erratically"
  5. a rock moved by geologic forces from one location to another, usually by a glacier; Anything that has erratic characteristics; unsteady, random; prone to unexpected changes; not consistent
  6. (erratically) (adv.): strangely; differently than normal
  7. (Erratics) rocks which have been transported and deposited by a glacier some distance from their source region.
  8. (erratics) Boulders and other rock fragments transported by glacial ice from their place of origin to an area where the bedrock is different.
  9. (Erratics) "The out-of-place alligator […] that turns up in an odd spot, undoubtedly through human agency, is not a zoological mystery […] [I]f someone discovers a new species of alligator that lives only in sewers, that is a different matter."
  10. (Erratics) Boulders that are clearly out of place in meadows or on mountaintops. Receding glaciers deposited them.
  11. A boulder that has been carried from its source by a glacier and deposited as the glacier melted. Thus, the boulder is often of a different rock type from surrounding types.
  12. a large, extremely heavy boulder found in an area of entirely different geology. As the boulder clearly did not form in this area it must have come from another, and source areas are usually pinpointed within a few kilometres but up to a couple of hundred kilometres distant. ...
  13. any kind of rock material that has been transported by ice or water a great distance from its origin and now rests on bedrock of different character, also called exotics.
  14. Boulder transported by a glacier and left behind when the ice melted.
  15. a rock which from its shape or composition is entirely foreign to the place where it is found, having been transported by glacial activity.
  16. A rock of unspecified shape and size, transported a significant distance from its origin by a glacier or iceberg and deposited when the ice melts. Erratics range from pebble-size to larger than a house and are of a different composition than the bedrock or sediment upon which they are deposited. ...
  17. A large rock or boulder that has been transported some distance from its source, usually by glacial action.
  18. A rock fragment carried by floating ice, deposited at some distance from the outcrop from which it was derived and generally composed of a different type of rock than the local bedrock*.
  19. A large boulder carried by glacial ice to an area removed from its point of origin. It is left behind when the ice melts.
  20. n. A large, isolated boulder left behind by a glacier.
  21. A piece of rock that deviates from the size and type of rock native to the area in which it rests
  22. (adj.): irregular. Calpurnia usually uses good grammar, but when she is angry, her grammar is irregular.
  23. A boulder or cobble that was picked up by a glacier and deposited hundreds of kilometers away from the outcrop from which it detached.
  24. A large boulder dropped by a glacier in the middle of somewhere, normally where you wouldn’t expect it to be.
  25. A boulder, often large, which is found in an area where it is not native. The assumption has been that an erratics are transported by glacial ice and are a relict of past ice ages. ...