lapillus


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). Movements of the lapillus send signals to the brain and help the fish to maintain equilibrium. It is usually very small but is the largest otolith in Siluridae. Also called utriculith

Dictionary of ichthyology. 2009.

Look at other dictionaries:

  • 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 — 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 — /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] * * * ▪ volcanic ejecta plural  Lapilli,   unconsolidated volcanic fragment with a diameter… …   Universalium

  • 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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