Definition of perisperm in English:

perisperm

noun

Botany
  • (in some seeds) a mass of nutritive material outside the embryo sac.

    • ‘In cucumber, muskmelon, and other seeds, a thin perisperm-endosperm envelope completely encloses the embryo.’
    • ‘Scarification was accomplished by piercing the seed coat and scraping a small portion of the perisperm with a sterile dissecting needle.’
    • ‘They were treated with 65% sulfuric acid for 10 min at room temperature to hydrolyse their impermeable waterproofing perisperm.’
    • ‘The perisperm is present in abundance.’
    • ‘Almost all of the seeds have popped along their long axis due to the swelling of the starchy perisperm during heating.’

Origin

Early 19th century: from peri- ‘around’ + Greek sperma seed.

Pronunciation:

perisperm

/ˈpɛrɪspəːm/