| arceuthobium | (n) genus of chiefly American plants parasitic on conifers, Syn. genus Arceuthobium |
| american mistletoe | (n) small herb with scalelike leaves on reddish-brown stems and berrylike fruits; parasitic on spruce and larch trees, Syn. Arceuthobium pusillum |
| Arceuthobium | prop. n. A genus of chiefly American plants parasitic on conifers. |