MICROGRAM

\mˈa͡ɪkɹə͡ʊɡɹˌam], \mˈa‍ɪkɹə‍ʊɡɹˌam], \m_ˈaɪ_k_ɹ_əʊ_ɡ_ɹ_ˌa_m]\
Sort: Oldest first
 
2006 - WordNet 3.0
By Princeton University
 
1898 - American pocket medical dictionary
By Willam Alexander Newman Dorland