muscle

muscle is defined in Webster's Unabridged Dictionary (1913) with 2 senses. The full text of each entry is reproduced verbatim below.

Definitions

  1. 1.Muscular strength or development; as, to show one's muscle by lifting a heavy weight. [Colloq.]
  2. 2.Etym: [AS. muscle, L. musculus a muscle, mussel. See above.] (Zoöl.) See Mussel. Muscle curve (Physiol.), contraction curve of a muscle; a myogram; the curve inscribed, upon a prepared surface, by means of a myograph when acted upon by a contracting muscle. The character of the curve represents the extent of the contraction.

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

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