Xanthose :: Xanthose (n.) An orange-yellow substance found in pigment spots of certain crabs.
Yellowseed :: Yellowseed (n.) A kind of pepper grass (Lepidium campestre).
York Use :: York use () The one of the three printed uses of England which was followed in the north. It was based on the Sarum use. See Use, n., 6..
Yourself :: Yourself (pron.) An emphasized or reflexive form of the pronoun of the second person; -- used as a subject commonly with you; as, you yourself shall see it; also, alone in the predicate, either in the nominative or objective case; as, you have injured yourself..
Zamouse :: Zamouse (n.) A West African buffalo (Bubalus brachyceros) having short horns depressed at the base, and large ears fringed internally with three rows of long hairs. It is destitute of a dewlap. Called also short-horned buffalo, and bush cow..