furan

As a noun furan

is (organic chemistry) any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and an oxygen atom; especially the simplest one, c₄h₄o.

As a letter x is

the twenty-fourth letter of the.

As a symbol x is

voiceless velar fricative.

As nouns the difference between initialism and furan

is that initialism is a term formed from the initial letter or letters of several words or parts of words, but which is itself pronounced letter by letter while furan is (organic chemistry) any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and an oxygen atom; especially the simplest one, c₄h₄o.

As a noun furan

is (organic chemistry) any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and an oxygen atom; especially the simplest one, c₄h₄o.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between furan and furaldehyde

is that furan is (organic chemistry) any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and an oxygen atom; especially the simplest one, c₄h₄o while furaldehyde is (organic compound) furfural.

In organic chemistry|lang=en terms the difference between furan and pyrrole

is that furan is (organic chemistry) any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and an oxygen atom; especially the simplest one, c₄h₄o while pyrrole is (organic chemistry) any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and a nitrogen atom; especially the simplest one, c₄h₅n.

As nouns the difference between furan and pyrrole

is that furan is (organic chemistry) any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and an oxygen atom; especially the simplest one, c₄h₄o while pyrrole is (organic chemistry) any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and a nitrogen atom; especially the simplest one, c₄h₅n.

Puran is likely misspelled.

Puran has no English definition.

As a noun furan is

any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and an oxygen atom; especially the simplest one, C₄H₄O.

As nouns the difference between furane and furan

is that furane is furan while furan is any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and an oxygen atom; especially the simplest one, C₄H₄O.

As nouns the difference between furfan and furan

is that furfan is a member of the furry fandom subculture while furan is (organic chemistry) any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and an oxygen atom; especially the simplest one, c₄h₄o.

As nouns the difference between furin and furan

is that furin is (enzyme) a protease found in certain animal cells while furan is (organic chemistry) any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and an oxygen atom; especially the simplest one, c₄h₄o.