(chemistry) Any of many effects in organic chemistry in which the course of a reaction, or its rate, is affected by the presence of a neighbouring functional group; anchimeric assistance

A particle with diameter less than about 100 nanometers (nm).

(physics) Any of a number of bound states of a heavy quark and its antiquark, especially that formed from a bottom quark and an anti-bottom quark.

(grammar) Any participle used as a dangling modifier.

A dangling participle.

(dated) atomic theory

(physics) The study of the motion of individual particles.

(physics) The sum of a particle's potential energy and kinetic energy

(theology) The difficulty of regarding a single individual human (Jesus) as being the saviour for all humans.

Alternative spelling of bipartisan