Antonyms of adj biface

1 sense of biface

Sense 1
biface, bifacial -- (having two faces or fronts; "the Roman Janus is bifacial")

INDIRECT (VIA bidirectional) -> unidirectional -- (operating or moving or allowing movement in one direction only; "a unidirectional flow"; "a unidirectional antenna"; "a unidirectional approach to a problem")

Similarity of adj biface

1 sense of biface

Sense 1
biface, bifacial -- (having two faces or fronts; "the Roman Janus is bifacial")
       => bidirectional (vs. unidirectional) -- (reactive or functioning or allowing movement in two usually opposite directions)