Surgery. A hollow between muscles or tendons, esp. one used as a site for cautery; = fontanelle, n. 1a. Obsolete.

Anatomy. A natural hollow on the surface of the body, typically one located between two muscles or tendons. Cf. well, n.1 7. Obsolete.

The upper or principal extremity of various things, esp. when projecting, distinct, removable, or of… Anatomy. The end of a muscle that remains…

‘The part of anything that swells out into a larger capacity’ (Johnson); the bulging part e.g. of a pot or bottle; a suddenly widened part of a vein…

Anatomy. (See quot. 1728.) Obsolete.

A thing, part, or appendage, resembling the tail of an animal in shape or position. The attenuated part of a muscle at its insertion.

Embryology and Zoology. A part of the embryonic mesoderm which gives rise to the skeletal muscles; each of the metameric segments of this. Also…

A sclerous element intervening between successive myotomes.

Each of a series of blocks of mesodermal tissue situated on either side of the spine in vertebrate embryos; (also) each of the muscle blocks…

A fusiform bundle of specialized muscle fibres with sensory and motor innervation enclosed in a capsule of connective tissue, present in large…

Anatomy. = muscle spindle, n.

A transverse dark line in a fibril of striated muscle formed by Krause's membrane (see Krause, n. b); the membrane itself.

Anatomy. A structure found in vertebrate cardiac muscle and some insect muscle, consisting of a transverse tubule in contact with a terminal cisterna…

Anatomy. A structure found in the striated skeletal muscle of most vertebrates, which consists of a transverse tubule of the T-system in contact…