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English to English noun
| 1 |
the folding in of an outer layer so as to form a pocket in the surface |  | Example: the invagination of the blastula
source: wordnet30
| 2 |
(biology) growth in the surface area of a cell by the deposit of new particles between existing particles in the cell wall | | source: wordnet30
| 3 |
The reception of one part within another. | | source: webster1913
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