Plural of bifidity; multiple instances or varieties of the state of being split into two parts.
From 'bifidity' plus the plural suffix '-ies.' The root 'bifid' comes from Latin 'bifidus' (split in two), with the suffix '-ity' creating an abstract noun describing the quality or condition.
The plural 'bifidities' is rarely used, which is actually fascinating—it suggests that scientists usually talk about bifidity as a general property rather than counting up multiple types of splitness!
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