Definition of spermidine in English:


Line breaks: spermi|dine
Pronunciation: /ˈspəːmɪdiːn


[mass noun] Biochemistry
A colourless compound with a similar distribution and effect to spermine.
  • A polyamine; chemical formula: H2N(CH2)3NH(CH2)4NH2
More example sentences
  • The present study indicates that DNA resolubilization at high concentrations of spermine and spermidine is explained by formation of small particles of condensed DNA that cannot be precipitated by centrifugation.
  • These specificities lead to preferential bindings through the DNA minor groove for putrescine and spermidine, whereas spermine binds by the major groove.
  • Maybe even higher efficiencies would have been obtained using spermine instead of spermidine.


1920s: from sperm + -ide + -ine4.

Definition of spermidine in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day flippant
Pronunciation: ˈflɪp(ə)nt
not showing a serious or respectful attitude