The term "annihilate" literally means "turn into nothing". However, when a particle and antiparticle collide, they clearly do not turn into nothing; they simply transform into different particles.
Did the term originate at a time when physicists thought that matter + antimatter really did turn into nothing? Does anyone else find the term confusing and/or misleading? Can we introduce a better term?
(I find it especially irritating to hear physicists say that an electron and a positron annihilate into two photons... that's an oxymoron!)