Hyloeid

A hyloeid (/haɪ-lɔɪd/, sometimes hylœid) is a sentient being comprised of matter, in opposition to an aetherius which is a sentient being comprised of energy.

Etymology
Aristotle, the Greek philosopher who declared that αἰθήρ (aithēr) was the fifth classical element, believed that even the elements themselves were composed of two basic principles: matter and form. He adapted the word ὑλη (hyle or hule), literally meaning wood or timber or "raw material" for building, to indicate that matter was the building block of the world. More specifically Aristotle indicated by the use of the word that matter changes from one substance to another, like wood to a house, and that parts can be deconstructed and reconstructed. In doing so Aristotle laid a philosophical precept that supported future scientific research into the breakdown and makeup of molecules, atoms, and other microscopic building blocks.