OPSiin
OPSiin is a term that does not have a single, widely recognized definition in science or technology. It appears in a small number of discussions as a coined name or acronym, and its meaning is typically tied to the context in which it is used. Because there is no consensus, OPSiin functions more as a placeholder label than as a standardized concept.
In speculative or fictional contexts, OPSiin is sometimes described as a hypothetical class of enhanced opsin-like
Because OPSiin lacks formal definition and broad adoption, the exact meaning must be inferred from the source