noun
Etymology: jack (I) (something smaller)
: a timber (as a rafter, rib, or studding) that from being intercepted is shorter than the others with which it is used
noun
Etymology: jack (I) (something smaller)
: a timber (as a rafter, rib, or studding) that from being intercepted is shorter than the others with which it is used
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012