hiatus

noun6

1. •
   An interruption, break, pause or absence.

   • The band decided to go on hiatus, citing creative differences.
2. •
   An temporary break from work, especially one which is unexpected.
3. •
   A gap in a series, making it incomplete.

   • Even the mechanical engineer comes at last to an end of his figures, and must stand up, a practical man, face to face with the discrepancies of nature and the hiatuses of theory. — 1912
4. •
   A gap in geological strata.

   • The beginning of the Mesozoic Era on the Colorado Plateau is marked by a regional hiatus or break of sedimentary deposition that lasted about 25 to 30 Ma. — 2012
5. •
   A syllable break between two vowels, without an intervening consonant.
6. •
   An opening in an organ.

   • Hiatus aorticus is an opening in the diaphragm through which aorta and thoracic duct pass.