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1. (Geology) interleaved, formed in distinctly alternating layers. (

2. Interpolate (an intercalary period) in a calendar. (Google Dictionary)

3. Insert (something) between layers in a crystal lattice, geological formation, or other structure. (Google Dictionary)

4. Interposed; inserted between two others. (

Word origin: From Latin intercalatus, past participle of intercalare “to proclaim the insertion of an intercalary day,” from inter- “between” + calare “calendar”.

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