1979 D. Clark iv. 54 The number of these ‘plerionic’ remnants—so-called from the Greek word meaning ‘filled centre’—is difficult to estimate, since they tend to mimic ionized hydrogen regions in some of their properties.
1999 21 May 236 Thus, unless G 10.0–0.3 is not a plerionic SNR, the conclusion that SGR1806–20 is a magnetar seems unavoidable.