twinning

Meanings

1. present participle and gerund of twin

1. The act of producing twins.
2. The act of giving birth to twins.
3. The pairing of similar objects (such as towns).
4. The formation of twin crystals.
5. A type of identity transformation where a subject transforms into a copy or clone of someone else.
6. The conversion of a road into a dual carriageway.

1. Producing two offspring from one pregnancy.

Etymology

From twin + -ing.