Intercalate /(?)/

In·ter·ca·late

Intercalate

v. t.

imp. & p. p. Intercalated; p. pr. & vb. n. Intercalating

  1. To insert, as a day or other portion of time, in a calendar. (Chron.)
  2. To insert among others, as a verse in a stanza; specif. (Geol.), to introduce as a bed or stratum, between the layers of a regular series of rocks. (Geol.)
    Beds of fresh-water shells . . . are intercalated and interstratified with the shale.