calumnious

of, involving, or using calumny; slanderous; defamatory.

samba

a ballroom dance of Brazilian (ultimately African) origin.

apostate

someone who forsakes their church, cause, party, etc.

chemiluminescence

the emission of light as the result of a chemical reaction involving two reactive agents and an intermediate substance which is excited and fluoresces as it decays to a lower energy level.

hydrometeor

the state or effect of water, water-vapour, or ice in the atmosphere, as rain, ice crystals, hail, fog, and clouds.

proparoxytone

having an acute accent on the antepenultimate syllable.

jumpmaster

someone who controls parachutists from the time they enter the aircraft until they exit; stick commander.