LOSSLESS

lossless

(adjective) characterized by or causing no dissipation of energy

Source: WordNet® 3.1

Etymology

Adjective

lossless (comparative more lossless, superlative most lossless)

free from loss, especially not losing electrical energy or force

(information theory) Not losing information.

Antonyms

• lossy

Source: Wiktionary

Loss"less, a.

Definition: Free from loss. [Obs.] Milton.

Source: Webster’s Unabridged Dictionary 1913 Edition