Definition of prochromosome in US English:

prochromosome

noun

Biology
  • A mass of densely staining chromosome material that occurs in certain interphase nuclei, often near the centromere of a chromosome.

Origin

Early 20th century; earliest use found in The Botanical Gazette. From pro- + chromosome, after German Prochromosom.

Pronunciation

prochromosome

/prəʊˈkrəʊməsəʊm/