protoactiniumDict.lkDict.lk - Sinhala to English DictionaryMeaning protoactinium Tweet Sinhala Dictionary definitions for protoactiniumprotoactinium 🔊protoactinium : ප්රෝටොඇක්ටිනියම්Lern More AboutWiki Definition: protoactiniumGoogle Search result: GoogleWiki Article: Wikipedia Tweet