This list contains acronyms, initialisms, and pseudo-blends  that begin with the letter Y.

For the purposes of this list:

  • acronym = an abbreviation pronounced as if it were a word, e.g., SARS = severe acute respiratory syndrome, pronounced to rhyme with cars
  • initialism = an abbreviation pronounced wholly or partly using the names of its constituent letters, e.g., CD = compact disc, pronounced cee dee
  • pseudo-blend = an abbreviation whose extra or omitted letters mean that it cannot stand as a true acronym, initialism, or portmanteau (a word formed by combining two or more words).
(a) = acronym, e.g.: SARS – (a) severe acute respiratory syndrome
(i) = initialism, e.g.: CD – (i) compact disc
(p) = pseudo-blend, e.g.: UNIFEM – (p) United Nations Development Fund for Women
(s) = symbol (none of the above, representing and pronounced as something else; for example: MHz – megahertz)

Some terms are spoken as either acronym or initialism, e.g., VoIP, pronounced both as voyp and V-O-I-P.

(Main list of acronyms)

Y0–9 edit

  • Y2K – (i) Year Two Thousand

YA edit

YB edit

  • Yb – (s) Ytterbium
  • YB – (i) Youcef Benzouada (Southern Algerian name)

YC edit

YD edit

YE edit

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YH edit

  • yH – (s) Yoctohenry
  • YH – (s) Yottahenry
  • YHS – Ya Hoor sur!
  • YHBT – (i) You Have Been Trolled
  • YHIH1 – (a) You Heard It Here First (lowercase: yhih1, pronounced yi-hi)
  • YHII – You Have It Inside

YI edit

YJ edit

YK edit

YL edit

YM edit

  • ym – (s) Yoctometre
  • Ym – (s) Yottametre
  • YM – (s) Yemen (FIPS 10-4 country code) – (i) Your Magazine (originally Young Miss, later Young & Modern)
  • YMCA – (i) Young Men's Christian Association
  • YMD – (s) People's Democratic Republic of Yemen (ISO 3166 trigram, obsolete 1990)
  • YMMD – (i) You Make My Day
  • YMMV – (i) Your Mileage May Vary (adapted from the EPA's automobile mileage estimates, where it is used to convey the original meaning, "results may vary"); but (now) when used as an idiom, it -- (either the acronym "YMMV" or the 4 words) -- can instead mean (this e.g. comes from wikt:your mileage may vary#Phrase:) "this is just my opinion, your opinion may be different".

YN edit

YO edit

YP edit

  • YPA – (i) Yards per Pass Attempt (football statistic)
  • YPG – (i) Yekîneyên Parastina Gel (Kurdish, "People's Protection Units" or "People's Defense Units")
  • YPIO – (a) Your Problem Is Obvious
  • YPO – (a) Young Presidents' Organization

YR edit

YS edit

YT edit

YU edit

YV edit

YW edit

YY edit

YZ edit