\In*ter"ca*late\, v. t. [imp. & p. p.
{Intercalated}; p. pr. & vb. n. {Intercalating}.] [L.
intercalatus, p. p. of intercalare to intercalate to
intercalate; inter between + calare to call, proclaim. See
{Calendar}.]
1. (Chron.) To insert, as a day or other portion of time, in
   a calendar.
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.
         Beds of fresh-water shells . . . are intercalated
         and interstratified with the shale.   --Mantell.