anti-matter
Meaning
A form of matter composed of antiparticles, such as positrons and antiprotons, which have the same mass as ordinary particles but opposite electric charge and other quantum properties.
Structure
Usage
Scientists created a minute amount of antimatter in the laboratory.
When matter and antimatter collide, they annihilate each other, releasing energy.
The concept of antimatter is a staple of science fiction, often used as a hypothetical power source.
Etymology
The term is a modern scientific compound, first theorized in the late 1920s and confirmed by discovery in the 1930s. It is formed by directly combining the Greek-derived prefix 'anti-', meaning "opposite," with the English word 'matter', which originates from Latin materia (meaning "substance" or "timber"). The logic is perfectly transparent: antimatter is the conceptual and physical counterpart to ordinary matter, with properties that are directly opposed. This construction follows a long tradition in English of using 'anti-' to form nouns denoting direct opposition or inversion, such as 'antiparticle' or 'antithesis'.
Analysis
- anti: From Greek, via Latin and French. A prefix meaning "against," "opposite of," or "in place of." - matter: From Latin materia (substance, timber), via Old French matere. In this compound, it refers to physical substance.