Definition (full): a channel, watering-box, ringlet of hair
Strong's Exhaustive Concordance
From an unused root apparently meaning to hollow out; a channel or watering-box; by resemblance a ringlet of hair (as forming parallel lines) -- gallery, gutter, trough.
KJV: And he set the rods which he had pilled before the flocks in the gutters in the watering troughs when the flocks came to drink, that they should conceive when they came to drink.
NASB: He set the rods which he had peeled in front of the flocks in the gutters, even in the watering troughs, where the flocks came to drink; and they mated when they came to drink.
KJV: And it came to pass, whensoever the stronger cattle did conceive, that Jacob laid the rods before the eyes of the cattle in the gutters, that they might conceive among the rods.
NASB: Moreover, whenever the stronger of the flock were mating, Jacob would place the rods in the sight of the flock in the gutters, so that they might mate by the rods;