XM., XMAS. Christmas.
XN., XTIAN. Christian.
Y., YR. Year.
Y., YD. Yard.
Y^E. The (the _Y_ not being a _Y_, but as representing the Anglo-Saxon þ).
Y.M.C.A. Young Men's Christian Association.
YR. Your; Younger.
Y^T. That (_Y_ as in Y^e).
Y.W.C.A. Young Women's Christian Association.
ZN. Zinc.
ZECH. Zechariah.
ZEPH. Zephaniah.
ZR. Zirconium.
&, _et_=And.
&C., _et cetera_=And so forth.
* * * * *