15-Letter Words Containing: _,A,E,R,S,X

• Any member of the Paramyxoviridae family of negative-sense single-stranded RNA viruses responsible for a number of human and animal diseases.

• The fused head and thorax of spiders and crustaceans

• extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds

• a sexual attraction to (or sexual relations with) persons of the opposite sex

• an empirical doctrine that advocates experimental principles

• an orientation that favors experimentation and innovation

• refutation by example