sudditen.

/ˈsʌdʌɪt/Etymology: < sudd n. + -ite suffix1.
society > occupation and work > materials > fuel > [noun] > specific miscellaneous types
1911 20 Apr. 6 The new fuel is to be known as Suddite.
This entry has not yet been fully updated (first published 1915; most recently modified version published online March 2018).