inclusion

1. An addition or annex to a group, set, or total. (countable) · The poem was a new inclusion in the textbook.
2. The act of including, i.e. adding or annexing, (something) to a group, set, or total. (uncountable) · The inclusion of the poem added value to the course.
3. Anything foreign that is included in a material. (countable)
4. Any material that is trapped inside a mineral during its formation, as a defect in a precious stone. (countable)
5. A nuclear or cytoplasmic aggregate of stainable substances. (countable, uncountable)
6. An object completely inside a tissue, such as epidermal inclusion cyst, a cyst in the epidermis. (countable, uncountable)
7. A mapping where the domain is a subset of the image. (countable, uncountable)

Plural inclusions