The period in which the sun is 6°–12° below the horizon in the morning and evening.

The period in which the sun is between 12° and 18° below the horizon in the morning and evening.

A town paired with another through town twinning.

plural of twin bed

Alternative form of a stopped clock is right twice a day

plural of Siamese twin

plural of conjoined twin

One of the two identical twins who are born attached together in utero.

A conjoined twin; one of two people physically joined together.

A (mainly obsolete) type of washing machine comprising a vertical washing cylinder alongside a vertical rinsing and spinning cylinder, the clothes having to be manually transferred from one to the other during the wash cycle.