Definition of perisperm in English:

perisperm

noun ˈpɛrɪspəːm

Botany

(in some seeds) a mass of nutritive material outside the embryo sac.
〔植〕（某些种子的）外胚乳
Example sentencesExamples
- The perisperm is present in abundance.
- 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.
- 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'.

单词	perisperm
释义	Definition of perisperm in English: perisperm noun ˈpɛrɪspəːm Botany (in some seeds) a mass of nutritive material outside the embryo sac. 〔植〕（某些种子的）外胚乳 Example sentencesExamples The perisperm is present in abundance. 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. 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'.
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