ROOM-AND-PILLAR


Meaning of ROOM-AND-PILLAR in English

/roohm"euhn pil"euhr, room"-/ , adj. Mining.

noting a means of extracting coal or other minerals from underground deposits by first cutting out rooms, then robbing the pillars between them; pillar-and-breast. Cf. longwall .

Random House Webster's Unabridged English dictionary.      Полный английский словарь Вебстер - Random House .