diamagnetn.
/ˌdʌɪəˈmaɡnɪt/ = diamagnetic n.
ΚΠ
1864 in Webster's Amer. Dict. Eng. Lang.
1871 J. Tyndall Fragm. Sci. (1879) I. xiii. 380 Each man walking over the earth's surface is a true diamagnet.
This entry has not yet been fully updated (first published 1895; most recently modified version published online March 2018).
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n.1864