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» Science fiction » <span class="searchmatch">Fictional</span> <span class="searchmatch">materials</span> This category concerns the topic: terms for types or instances of <span class="searchmatch">fictional</span> <span class="searchmatch">materials</span>. This category contains...
See also: Category:<span class="searchmatch">en</span>:Systematic element names Edit category data Recent changes Fundamental » All languages » English » All topics » Nature » Matter...
terms in specific languages. You may be interested especially in Category:<span class="searchmatch">en</span>:Hypothetical chemical elements, for English terms. Subcategories of this one...