handwavium

== English == === Etymology === From hand waving +‎ -ium (“the chemical element suffix”). === Pronunciation === (Received Pronunciation) IPA(key): /handˈweɪ.vi.əm/ (General American) IPA(key): /hændˈweɪ.vi.əm/ Hyphenation: hand‧wav‧i‧um === Noun === handwavium (uncountable) (informal, fiction) Any hypothetical but unobtainable material with desirable engineering properties. ==== Synonyms ==== ==== Related terms ====