octeractWiktionary 原文英美构词拆解oct-前缀+tesseract词干oct-Form of octa- or octo- used before a vowel. · (chemistry) Used for the digit eight to form systematic element names of elements whose existence has been predicted, and which have not yet been given a trivial name.词源说明Blend of oct- + tesseract.释义名词noun1(mathematics) An eight-dimensional hypercube