Braverman, H. (1974). 18. The “Middle Layers” of Employment. In Braverman, H. Labor and Monopoly Capital: The Degradation of Work in the Twentieth Century. Monthly Review Press, pp. 403-409
(adjective) crowded or pressed together; compact / (adjective) marked by ridges; serrate / (verb) to press together especially in ranks / (verb) to crowd together