erector muscle of hair n.
Any of the bundles of smooth muscle fibers, attached to the deep part of hair follicles, passing outward alongside the sebaceous glands to the papillary layer of the corium, whose action erects hairs.
- Erector muscle of spine
erector muscle of spine n. A muscle with origin from the sacrum, ilium, and spines of the lumbar vertebrae, dividing into three columns that insert into the ribs and vertebrae, with nerve supply from the posterior branches of the spinal nerves, and whose action extends the vertebral column.
Trademark. 1. a brand of children’s building game.
noun 1. the region of the ionosphere in which the E layer forms. noun 1. a region of the ionosphere, extending from a height of 90 to about 150 kilometres. It reflects radio waves of medium wavelength Also called Heaviside layer, Kennelly-Heaviside layer See also ionosphere E region The region of the ionosphere that lies […]
[air-lawng, -long] /ɛərˈlɔŋ, -ˈlɒŋ/ adverb 1. before ; soon. /ɛəˈlɒŋ/ adverb 1. (archaic or poetic) before long; soon