See also: -sla, sla, slá, and slå English Noun SLA (countable and uncountable, plural SLAs) Initialism of sealed lead-acid battery. Initialism of second language acquisition. Initialism of service level agreement. Initialism of specific leaf area. Initialism of stereolithography apparatus. (Maoism, politics, US) Initialism of Symbionese Liberation Army. (politics) Initialism of Sudan Liberation Army, (also known as SLM) References SLA on Wikipedia.Wikipedia Anagrams -sal, -sal-, ALS, ALs, ASL, LAs, LSA, SAL, Sal, a/s/l, al's, als, asl, las, sal, sal- Wikiwand - on Seamless Wikipedia browsing. On steroids.