twinning

(noun, adjective, verb)

adjective

1. producing two offspring at a time

Similar word(s): multiparous, biparous

noun

1. action of the verb to twin

2. giving birth to twins

3. the pairing of similar objects (such as towns)

4. (mineralogy) the formation of twin crystals

5. (transport) the conversion of a road into a dual carriageway

verb

1. present participle of twin