lapillus

lapillus
/leuh pil"euhs/, n., pl. lapilli /-pil"uy/.
a small stony particle ejected from a volcano.
[1740-50; < L: little stone, pebble, dim. of lapis stone]

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volcanic ejecta
plural  Lapilli, 
 unconsolidated volcanic fragment with a diameter between 4 and 32 mm (0.16 and 1.26 inches) that was ejected during a volcanic explosion. Lapilli may consist of fresh magma, solid magma from a prior eruption, or basement rocks through which the eruption passed. Accretionary lapilli are pellets formed by the accretion of volcanic ash or dust around moisture droplets; as in hailstones formed of water, these volcanichailstonesmay show concentric ringssome as much as 10 cm (four inches) acrosswhen they are carried through the eruption cloud several times by turbulent updrafts.

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  • lapillus — [lə pil′əs] n. pl. lapilli [lə pil′ī΄] [L, dim. of lapis, stone] a small fragment of igneous rock, up to the size of a walnut, ejected from a volcano …   English World dictionary

  • lapillus — (plural lapilli)) the otolith in the utriculus of the pars superior. It is held in a vertical position against the cells of the utricular macula which is innervated by the anterior branch of cranial nerve VIII (the stato acoustic nerve).… …   Dictionary of ichthyology

  • Lapillus — La|pịl|lus 〈m.; , pịl|li; meist Pl.〉 bei Vulkanausbrüchen ausgeworfenes, 1 bis 3 cm großes Lavastück [<ital. lapilli (Pl.) „Steinchen“ <lat. lapillus „Steinchen“, Verkleinerungsform zu lapis „Stein“] …   Universal-Lexikon

  • Lapillus — La|pịl|lus 〈m.; Gen.: , Pl.: pịl|li; meist Pl.〉 bei Vulkanausbrüchen ausgeworfenes, 1 bis 3 cm großes Lavastück [Etym.: <ital. lapilli (Pl.) »Steinchen« <lat. lapillus »Steinchen«, Verkleinerungsform zu lapis »Stein«] …   Lexikalische Deutsches Wörterbuch

  • lapillus — noun (plural lapilli) Etymology: Latin, diminutive of lapis Date: 1747 a small stony or glassy fragment of lava ejected in a volcanic eruption …   New Collegiate Dictionary

  • lapillus — n. small stone ejected from a volcano …   English contemporary dictionary

  • lapillus — la·pil·lus …   English syllables

  • lapillus — la•pil•lus [[t]ləˈpɪl əs[/t]] n. pl. pil•li [[t] ˈpɪl aɪ[/t]] gel a small stony particle ejected from a volcano • Etymology: 1740–50; < L: pebble, dim. of lapis stone …   From formal English to slang

  • lapillus —   n. (pl. li ) small stone, especially ejected by volcano.    ♦ lapilliform, a. like small stones …   Dictionary of difficult words

  • lapillus — …   Useful english dictionary

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