axenic (adjective) sterilized: completely clean
Sinonime: bifurcation, bilaterality, binary,
brace,
couple, deuce,
dichotomy, diremption, dos,
double, doublet,
dual, duality, duet, duplexity,
duplicity, dyad,
pair,
span,
team, twain,
twin, twins
Antonime: contaminated,
dirty