o-Hydroxyphenylmercuric chloride
Baker's yeast
Yellow AB
Yellow fever virus
Yersina pestis
YOYO-1
Ytterbium
Ytterbium acetate
Ytterbium chloride
Ytterbium chloride hexahydrate
Ytterbium citrate
Ytterbium fluoride
Ytterbium hydroxide
Ytterbium nitrate
Ytterbium nitride
Ytterbium oxide
Ytterbium sulfide
Ytterbium telluride
Yttrium
Yttrium acetate
Yttrium aluminide
Yttrium barium copper oxide
Yttrium boride
Yttrium bromide
Yttrium carbide
Yttrium chloride
Yttrium chloride hexahydrate
Yttrium fluoride
Yttrium hydroxide
Yttrium iodide
Yttrium nitrate
Yttrium nitrate hexahydrate
Yttrium nitrate pentahydrate
Yttrium nitride
Yttrium orthosilicate
Yttrium oxalate
Yttrium oxide
Yttrium phosphide
Yttrium silicide
Yttrium sulfide
Yttrium trimethoxyethoxide
Yttrium-90