JAMBSTONE
Meaning of JAMBSTONE in English
/jam"stohn'/ , n. Masonry.
a stone, or one of the stones, forming one jamb of an opening.
[ 1815-25; JAMB 1 + STONE ]
Random House Webster's Unabridged English dictionary.
Полный английский словарь Вебстер - Random House .
2012