intercalation

(Can this⁽⁺⁾ etymology be sourced?) From intercalate

intercalation (countable and uncountable, plural intercalations)

1. A period inserted into a calendar as in a leap year.
2. (chemistry) The reversible insertion of a molecule between two others.
3. (geology) A layer introduced into a pre-existing sequence.
   • 1968, Transactions of the Geological Society of South Africa, page 148:

     Their exact relationship to the host-rock is obscure but from their texture and observed metamorphic relationship they are thought to be intrusive dykes rather than intercalations of more basic lava.

• interactional

• IPA^(key): /ɛ̃.tɛʁ.ka.la.sjɔ̃/

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intercalation f (plural intercalations)

1. intercalation

• intercalaire
• intercaler

• “intercalation”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.