z

noun pl. Z's, z's

1. the twenty-sixth and last letter of the English alphabet: via Latin from the Greek zeta
2. any of the speech sounds that this letter represents, as, in English, the (z) of zone
3. a type or impression for z or Z
4. the twenty-sixth in a sequence or group
5. an object shaped like
6. ☆

   Etymology: see zzz

   Slang sleep: often in the phrase get (or catch, etc.) some (or a few, etc.) z's to sleep for a while

adjective

1. of z or Z
2. twenty-sixth in a sequence or group
3. shaped like

noun

1. the third of a set of unknown quantities, x and y usually being the first two
2. a variable

1. Astron. zenith distance
2. zepto-
3. zero
4. zone

Astron. zenith distance

1. Chem., Physics atomic number
2. Elec. impedance

zetta-