n. [ Myo- + Gr. &unr_; to show. ] (Zool.) A contractile striated layer found in the bodies and stems of certain Infusoria. [ 1913 Webster ]
n. [ NL. See Myope. ] (Med.) Nearsightedness; shortsightedness; a condition of the eye in which the rays from distant object are brought to a focus before they reach the retina, and hence form an indistinct image; while the rays from very near objects are normally converged so as to produce a distinct image. It is corrected by the use of a concave lens. [ 1913 Webster ]