twinning
nounUK /ˈtwɪnɪŋ/
US /ˈtwɪnɪŋ/
The act of being a twin or having a twin.
The twinning of the two sisters made them best friends for life.
OTHER MEANINGS
2. The process of giving birth to twins.
The doctor monitored the twinning closely during the pregnancy.
3. The formation of two similar crystals that grow together.
The mineral sample showed beautiful twinning under the microscope.
4. The linking of two towns or cities for cultural exchange.
The twinning of the two cities led to student exchange programs.