noun
nest of boxes; nesting
Refers to a set of containers that fit inside one another, like Russian dolls or stacking boxes. Also used for the concept of nesting in general.
この重箱は入れ子になっていて、収納に便利だ。
These nested boxes are convenient for storage.
入れ子の人形はロシアの民芸品として有名だ。
Nesting dolls are famous as a Russian folk craft.
noun
concealed information
Rare, possibly archaic usage referring to hidden or embedded information. Not common in modern Japanese.
古文書には入れ子のように秘密の情報が隠されていた。
In the old document, secret information was hidden like a nest.
noun
nested structure (computing)
Only when written 入れ子
Computing term for nested data structures, such as nested loops, tables, or tags.
See also: ネスティング
入れ子のループは処理が遅くなることがある。
Nested loops can sometimes slow down processing.
noun
adopting a child after one's own has died; child adopted in place of a deceased child
Only when written 入れ子
Dated term for a specific adoption practice. Rarely used in modern contexts.
昔は、亡くなった子の代わりに入れ子を迎える風習があった。
In the past, there was a custom of adopting a child to replace a deceased one.
noun
cavity in an oar (for a traditional oarlock)
Specialized term for a part of a traditional Japanese oar. See also 櫓杭.
See also: 櫓杭
和船の櫓には、入れ子と呼ばれる穴が開いている。
The oar of a traditional Japanese boat has a hole called an ireko.
Compound of 入れ (ire, 'putting in') + 子 (ko, 'child' or 'small thing'). The exact historical derivation is uncertain, but the word originally referred to a small container placed inside a larger one.