INTERCALATION
embolism, intercalation
(noun) an insertion into a calendar
Source: WordNet® 3.1
Etymology
Noun
intercalation (countable and uncountable, plural intercalations)
A period inserted into a calendar as in a leap year.
(chemistry) The reversible insertion of a molecule between two others.
(geology) A layer introduced into a pre-existing sequence.
Anagrams
• interactional
Source: Wiktionary
In*ter`ca*la"tion, n. Etym: [L. intercalatio: cf. F. intercalation.]
1. (Chron.)
Definition: The insertion of a day, or other portion of time, in a
calendar.
2. 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.
Intercalations of fresh-water species in some localities. Mantell.
Source: Webster’s Unabridged Dictionary 1913 Edition