From Wiktionary, the free dictionary
From micro- + task.
microtask (plural microtasks)
- A very small or simple task.
2015 September 19, “Lessons Learned from Crowdsourcing Complex Engineering Tasks”, in PLOS ONE[1], →DOI:Amazon Mechanical Turk is a web marketplace for crowdsourcing microtasks, such as answering surveys and image tagging.