"tachyon" . "tachyon field" . . . . . . . "Tachyon#Reinterpretation principle" . . "Tachyonic particle" . "the hypothetical sub-atomic particle by the same name" . "Tachyon" . . "tachyonic particles" . . . "tachyonic vertex operator" . "Tachyon" . "Tachyonic particles" .