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[lep-tin] /ˈlɛp tɪn/

a hormone that is thought to suppress appetite and speed up metabolism.
a protein, produced by fat cells in the body, that acts on the brain to regulate the amount of additional fat laid down in the body

a protein produced by fat cells and involved in regulating food intake and fat storage in the body
Word Origin

1995-2000; < Gk leptos thin leptin (lěp'tĭn') A peptide hormone and neurotransmitter produced by fat cells and involved in the regulation of appetite.


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  • Lepto

    [lep-toh] /ˈlɛp toʊ/ noun, Informal. 1. . 1. a combining form meaning “thin,” “fine,” “slight,” used in the formation of compound words: leptophyllous. combining form 1. fine, slender, or slight: leptosome lepto- or lept- pref. Slender; thin; fine: leptocyte.

  • Leptocephalic

    /ˌlɛptəʊsɪˈfælɪk/ adjective 1. having a narrow skull

  • Leptocephaly

    leptocephaly lep·to·ceph·a·ly (lěp’tə-sěf’ə-lē) n. A malformation characterized by an abnormally small cranium.

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