Please enable javascript to use dictionary! Howto enable javascript?
rarefaction [rarefactions]▼(reduction in the density of a material)noun[UK: ˌreə.rɪ.ˈfæk.ʃn̩] [US: ˌreə.rɪ.ˈfæk.ʃn̩]
rare [rarer, rarest]▼(very uncommon)adjective[UK: reə(r)] [US: ˈrer]
↑