15-letter words containing l, y, o
- xerographically — In a xerographic way; by xerography.
- xylotypographic — involving or pertaining to xylotypography
- yellow goatfish — a schooling goatfish, Mulloidichthys martinicus, inhabiting the Atlantic Ocean from Florida to Panama.
- yellow lead ore — wulfenite.
- yellow mandarin — (in the Chinese Empire) a member of any of the nine ranks of public officials, each distinguished by a particular kind of button worn on the cap.
- yin-yang school — a school of ancient Chinese philosophers who interpreted history in terms of the influence of the seasons and of five elements: earth, wood, metal, fire, and water.
- yorke peninsula — a peninsula in S Australia between Spencer Gulf and the Gulf of St. Vincent. 160 miles (257 km) long and 20–35 miles (32–56 km) wide.
- yorkshire dales — the valleys of the rivers flowing from the Pennines in W Yorkshire: chiefly Ribblesdale, Swaledale, Nidderdale, Wharfedale, and Wensleydale; tourist area
- yosemite valley — a glacial valley in Yosemite National Park in central California, in the Sierra Nevada Mountains. It has an altitude of about 1200 m (4000 ft), with sheer walls rising about another 1200 m (4000 ft).
- young's modulus — a coefficient of elasticity of a substance, expressing the ratio between a stress that acts to change the length of a body and the fractional change in length caused by this force.
- your-excellency — (usually initial capital letter). Also, Excellence. a title of honor given to certain high officials, as governors, ambassadors, and Roman Catholic bishops and archbishops (preceded by his, your, etc.).
- zoophysiologist — an expert in zoophysiology
- zoophytological — of or relating to zoophytology
- zygophyllaceous — belonging to the Zygophyllaceae, the caltrop family of plants.