noun
: a railroad crosstie with sapwood one fourth or less the width of the tie at the top measured at a point 20 inches to 40 inches from the middle of the tie
noun
: a railroad crosstie with sapwood one fourth or less the width of the tie at the top measured at a point 20 inches to 40 inches from the middle of the tie
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012