Definition of pseudo-base in US English:

pseudo-base

noun

Chemistry
  • A compound which is not itself a base but which exists in equilibrium with, or is easily converted into, a basic form and thus undergoes some typical reactions of bases.

Origin

Late 19th century; earliest use found in Journal of the Chemical Society. From pseudo- + base, after German Pseudobase.

Pronunciation

pseudo-base

/ˈs(j)uːdəʊbeɪs/