18TH

 Dictionary entry overview: What does 18th mean? 

• 18TH (adjective)
  The adjective 18TH has 1 sense:

1. coming next after the seventeenth in position

  Familiarity information: 18TH used as an adjective is very rare.

 Dictionary entry details 

• 18TH (adjective)

Sense 1

Meaning:

Coming next after the seventeenth in position

Synonyms:

18th; eighteenth

Similar:

ordinal (being or denoting a numerical order in a series)

 Context examples 

Al-Anani said a cartouche carved on the ceiling bears the name of King Thutmose I of the early 18th dynasty.

(Discovery of Two Tombs Dating Back 3,500 Years Announced in Egypt, VOA)

The battle to take place on Tuesday, May the 18th, at the hour of ten in the morning, at a spot to be afterwards named.

(Rodney Stone, by Sir Arthur Conan Doyle)

A constellation of symptoms that occur as a result of the presence of a complete third copy of the 18th chromosome.

(Complete Trisomy 18 Syndrome, NCI Thesaurus)

By the afternoon of that day—my pocket diary shows me that it was Tuesday, August 18th—at least six or seven drums were throbbing from various points.

(The Lost World, by Sir Arthur Conan Doyle)

Egypt announced the discovery of a pharaonic tomb in the southern city of Luxor belonging to a royal goldsmith who lived more than 3,500 years ago during the reign of the 18th dynasty.

(Egypt Announces Discovery of 3,500-Year-Old Luxor Tomb, The Titi Tudorancea Bulletin)

A polyunsaturated very long-chain fatty acid with a 22-carbon backbone and 5 double bonds, originating from the 6th, 9th, 12th, 15th and 18th positions from the methyl end.

(Docosapentaenoic Acid n-6, NCI Thesaurus)

Polyunsaturated fatty acid with 22 carbons and 5 double bonds at the 6th, 9th, 12th, 15th and 18th carbons from the methyl end.

(Docosapentaenoic Acid n-6, NCI Thesaurus/CRCH)

A polyunsaturated very long-chain fatty acid with a 22-carbon backbone and 6 double bonds, originating from the 3rd, 6th, 9th, 12th, 15th and 18th positions from the methyl end.

(Doconexent, NCI Thesaurus)

Polyunsaturated fatty acid with 22 carbons and 6 double bonds at the 3rd, 6th, 9th, 12th, 15th and 18th carbons from the methyl end.

(Doconexent, NCI Thesaurus/CRCH)

“My dear sir, it is painful for me to discuss it, but if the money is not paid on the 14th, there certainly will be no marriage on the 18th.”

(The Return of Sherlock Holmes, by Sir Arthur Conan Doyle)