X
xerography - n. a method of photocopying
Y
year - n. a period of time equal to twelve months
yellow - ad. having the color like that of gold or the sun
yes - ad. used to express agreement or to permit
yesterday - n. the day before today
yet - ad. at some time before now ("Have they arrived yet?"); now; at this time ("I cannot tell you about it yet."); conj. however ("The sun was shining, yet it was cold.")
you - pro. the person or persons being spoken to
young - ad. in the early years of life; not old
Z
zero - n. the number meaning none or nothing
zoo - n. a place where animals are kept for the public to look at and study