seedhouse noun2 •A building that is used for storing seeds.To date, 37 landraces of rice, 5 of sponge gourd, 3 of pigeon pea and 2 of finger millet seeds have been collected and stored in the seedhouse (Table 2) and this number is increasing. — 2005 •A business that specializes in selling seeds, especially one that operates via mail order.I am particularly baffled by those who wait to buy their seeds until they are ready to plant them, then have to get them at a store instead of from a seedhouse. — 2011 formsseedhouses