is a specific kind of: tree.

is a broader term that covers: Fraxinus Americana, white ash | Fraxinus caroliniana, swamp ash | flowering ash, Fraxinus cuspidata | flowering ash, Fraxinus dipetala | common European ash, European ash, Fraxinus excelsior | Fraxinus latifolia, Fraxinus oregona, Oregon ash | basket ash, black ash, brown ash, Fraxinus nigra, hoop ash | flowering ash, Fraxinus ornus, manna ash | downy ash, Fraxinus pennsylvanica, red ash | blue ash, Fraxinus quadrangulata | Fraxinus texensis, mountain ash | Fraxinus tomentosa, pumpkin ash | Arizona ash, Fraxinus velutina ... show more.

instances of which are: Ygdrasil, Yggdrasil.

has as a part: ash-key.

is a member of: Fraxinus, genus Fraxinus.

contains: ash.