transcription, транскрипция: [ ˈep-sə-ˌlän, -lən ]
noun
Etymology: Greek e psilon, literally, simple e
Date: 15th century
1. : the 5th letter of the Greek alphabet — see alphabet table
2. : an arbitrarily small positive quantity in mathematical analysis
• ep·si·lon·ic ˌep-sə-ˈlä-nik adjective