what is called anti-matter and anti-particles?

Answer 1

Antimatter is made up of antimatter particles in the same way that matter is made up of matter particles. Anti-particles are charge-parity antistates of their corresponding particles - for example, a positron is identical to an electron, but with opposite charge and parity state. When a particle and anti-particle come into contact, they annihilate.

Some particles, like a photon, are their own anti-particle (except photons don't interact, and so don't annihilate)

Answer 2

Anti-matter is called anti-matter because it doesn't matter.
Anti-particles are married to Uncle-Particles, although some are divorced.

What is called search engine?

Answer 3

Anti-something are just the same, but with opposed "sign" or charge.
A proton (of matter) has a positive electrical charge.
An electron has a negative charge.
Anti-matter is matter made of protons and electrons of opposite charge, in this case, the proton is NEGATIVE and the electron is of positive charge.
The two matters cannot coo-exist: the encounter of an atom of matter and an atom of anti-matter results in the anihilation of both atoms!