layer : Idioms & Phrases

Index

appleton layer

  • noun the highest region of the ionosphere (from 90 to 600 miles up) which contains the highest concentration of free electrons and is most useful for long-range radio transmission
    F region; Appleton layer.
WordNet

boundary layer

  • noun the layer of slower flow of a fluid past a surface
WordNet

conjunctival layer of bulb

  • noun the part of the conjunctiva covering the anterior face of the sclera and the surface epithelium of the cornea
    tunica conjunctiva bulbi; bulbar conjunctiva.
WordNet

conjunctival layer of eyelids

  • noun the part of the conjunctiva lining the posterior surface of the eyelids; continuous with the bulbar conjunctiva
    tunica conjunctiva palpebrarum; palpebra conjunctiva.
WordNet

d-layer

  • noun the lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves
    D region.
WordNet

e layer

  • noun a region of the ionosphere (from 50 to 90 miles up) that reflects radio waves of medium length
    E layer; Heaviside layer; E region.
WordNet

f layer

  • noun the highest region of the ionosphere (from 90 to 600 miles up) which contains the highest concentration of free electrons and is most useful for long-range radio transmission
    F region; Appleton layer.
WordNet

germ layer

  • noun (embryology) any of the 3 layers of cells differentiated in embryos following gastrulation
WordNet

Germinal layers

  • (Biol.), the two layers of cells, the ectoblast and entoblast, which form respectively the outer covering and inner wall of the gastrula. A third layer of cells, the mesoblast, which is formed later and lies between these two, is sometimes included.
Webster 1913

heaviside layer

  • noun a region of the ionosphere (from 50 to 90 miles up) that reflects radio waves of medium length
    E layer; Heaviside layer; E region.
WordNet

horny layer

  • noun the outermost layer of the epidermis consisting of dead cells that slough off
    corneum; stratum corneum.
WordNet

kennelly-heaviside layer

  • noun a region of the ionosphere (from 50 to 90 miles up) that reflects radio waves of medium length
    E layer; Heaviside layer; E region.
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layer cake

  • noun cake having layers held together by a sweet filling and usually covered with frosting
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malpighian layer

  • noun the innermost layer of the epidermis
    rete Malpighii; stratum basale; stratum germinativum.
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ozone layer

  • noun a layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun
    ozonosphere.
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Plate layer

  • a workman who lays down the rails of a railway and fixes them to the sleepers or ties.
Webster 1913

tissue layer

  • noun a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants
    membrane.
WordNet

wood-layer

Wood"-lay`er noun
Definitions
  1. (Bot.) A young oak, or other timber plant, laid down in a hedge among the whitethorn or other plants used in hedges.
Webster 1913