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Etymology · Ancient Greek

ἕξ

2 English words descend from Ancient Greek ἕξ, most common first.

exa-In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10¹⁸ (a short scale quintillion or long scale trillion); one million million million.
hexadecachoronA four-dimensional object analogous to an octahedron, constructed out of sixteen tetrahedra.