Antonyms of adj reproducible

1 sense of reproducible

Sense 1
reproducible (vs. unreproducible), consistent -- (capable of being reproduced; "astonishingly reproducible results can be obtained")

unreproducible (vs. reproducible), irreproducible -- (impossible to reproduce or duplicate)
        => inimitable -- (defying imitation; matchless; "an inimitable style")
        => unrepeatable -- (unique; "dogs and mice and flies are as unrepeatable as men are"- Theodosius Dobzhansky)

Similarity of adj reproducible

1 sense of reproducible

Sense 1
reproducible (vs. unreproducible), consistent -- (capable of being reproduced; "astonishingly reproducible results can be obtained")
       => duplicable, duplicatable -- (capable of being duplicated)