ollus ‎(genitive olluse, partitive ollust)

(chemistry) substance, matter, material
(chemistry) element

matter ‎(countable and uncountable, plural matters)

Substance, material.
(physics) The basic structural component of the universe. Matter usually has mass and volume.
(physics) Matter made up of normal particles, not antiparticles. (Non-antimatter matter).
A kind of substance.
(philosophy) Aristotelian: undeveloped potentiality subject to change and development; formlessness. Matter receives form, and becomes substance.
What’s the matter?