Something apparently seen, heard, or sensed, but having no physical reality; an image that appears only in the mind; an illusion or delusion.
A ghost or apparition.
A placeholder for a pair of players when there are an odd number of pairs playing.
A test object. A test phantom is an object that reproduces the characteristics of human tissue.
Illusive.
Fictitious or nonexistent.
Physical matter; material.
Material possessions; estate; property; resources.
Hypostasis.
Drugs (illegal narcotics)
Substantiality; solidity; firmness.
The essential part of anything; the most vital part.
A form of matter that has constant chemical composition and characteristic properties.
To give substance to; to make real or substantial.