[1885–90; pyro- + -phobia]This word is first recorded in the period 1885–90. Other words that entered Englishat around the same time include: classified, lineup, reactor, seminar, twoferpyro- is a combining form meaning “fire,” “heat,” “high temperature,” used in the formationof compound words. Other words that use the affix pyro- include: pyrogen, pyrolusite, pyromancy; -phobia is a combining form meaning “fear,” occurring in loanwords from Greek (hydrophobia). On this model, -phobia is used in the names of mental disorders that have the general sense “dread of, aversiontoward” that specified by the initial element. Other words that use the affix -phobia include: aerophobia, agoraphobia, aviophobia, technophobia, triskaidekaphobia