Intercalation1. (n.) The insertion of a day, or other portion of time, in a calendar.
2. (n.) The insertion or introduction of anything among others, as the insertion of a phrase, line, or verse in a metrical composition; specif. (Geol.), the intrusion of a bed or layer between other layers.
Thesaurus Entries
a huis clos, all, apart, askance, askant, askew, aslant, aslope, asquint, away, awry, back, behind closed doors, beside, between the teeth, broadside, broadside on, by, crabwise, discursion, divagation, downgrade, downhill, each, edgeway, edgeways, edgewise, episode, excursion, excursus, glancingly, in a whisper, in an aside, in camera, in chambers, in executive session, in juxtaposition, in privacy, in private, in private conference, in privy, in reserve, infix, injection, insert, insertion, insinuation, intercalation, interjection, interlineation, interlocution, interpolation, introduction, januis clausis, laterad, laterally, monodrama, monologue, monology, nearby, nigh, obiter dictum, obliquely, on its side, on one side, on the beam, on the side, out of earshot, parenthesis, per, per capita, privately, privily, remark, right and left, round, side remark, sideling, sidelong, sideward, sidewards, sideway, sideways, sidewise, sidling, slant, slantingly, slantways, slantwise, slaunchways, slopeways, soliloquy, solo, sotto voce, to one side, to the side, tossing-in, wide apart, wide away, with bated breath