A rarefação
Exaustão, rarefação.
The act or process of rarefying; the state of being rarefied; -- opposed to condensation; as, the rarefaction of air.
n.concentration generic term
Vogais: aeaio
Consoantes: rrfctn
refaction, rubefaction, refection, rarification, reification, reviction, revocation, revivification, refasten, revisitation.