What is the origin of 'sleep tight'?
Read moreOne of the mysteries of the English language finally explained.
Medicine. Designating a group of congenital myopathies characterized by the accumulation of rod-like bodies in muscle fibres; (also) designating the rod-like bodies present in such myopathies and in certain other muscle diseases.
Mid 19th century (in an earlier sense). From ancient Greek νῆμα thread + -ine, with insertion of -l- perhaps after nemalite.