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外乳 (がいにゅう) Japanese meaning | Kotomora

外がい乳にゅう

Meanings

1

noun

perisperm

Botanical term for the nutritive tissue in some seeds, derived from the nucellus. Used in technical contexts.

外がい乳にゅうは、種しゅ子しの中なかで胚はい乳にゅうの外そと側がわに形けい成せいされる貯ちょ蔵ぞう組そ織しきである。
Perisperm is a storage tissue formed outside the endosperm in seeds.

Kanji

外outside
乳milk, breasts

Similar words

胚はい乳にゅう
胚乳 (endosperm) is the more common nutritive tissue in seeds, while 外乳 (perisperm) is a specific tissue derived from the nucellus, found in certain plants.

Etymology

Compound of 外 (outside) and 乳 (milk/nutritive fluid), referring to the outer nutritive tissue in seeds. The exact historical derivation is uncertain; the spelling is conventionally associated with this botanical meaning.