ulp

• (Received Pronunciation, General American) IPA^(key): /ʌlp/

Imitative, or possibly a variant of gulp.

ulp

1. The sound of a person gulping in fear.

   Synonym: gulp

   • 2009 February 10, Joel Rubinoff, “Train wreck keeps rollin' along”, in Toronto Star‎:

     And where would the Grammys be without Motown maverick Stevie Wonder, continuing his slide into musical irrelevance with a mind-boggling collaboration with, ulp, teen idols the Jonas Brothers, who massacred their own "Burnin' Up" and Stevie's "Superstition" with boyish aplomb.

   • 2009, Charlie Connelly, And Did Those Feet:

     I sent her a text asking as nonchalantly as possible whether cows ever go for you. [...] The answer I got was, 'Occasionally they do, and they can be bloody scary.' Ulp.

   • 2015, Jennifer Stevenson, It's Raining Angels and Demons:

     Little—ulp—little red horns curving out of his brow. My mouth was totally dry.

Abbreviation of unit in the last place or unit of least precision.

ulp (plural ulps)

1. (computer science, mathematics) The value that the least significant digit of a floating-point number represents, used as a measure of accuracy in numeric calculations.
   • 1997, Donald E. Knuth, Art of Computer Programming, Volume 2: Seminumerical Algorithms:

     Floating point operations are correct to within half an ulp, and the calculation of uvw by two floating point multiplications will be correct within about one ulp (ignoring second-order terms).

   • 2018, Jean-Michel Muller, Handbook of Floating-Point Arithmetic, page 34:

     It is important to be able to establish links between errors expressed in ulps, and relative errors.

• PLU, UPL, pul

ulp f (invariable)

1. (computer science, mathematics) ulp (“unit in the last place (unità in ultima posizione) or unit of least precision (unità di minore precisione)”)