gemin- (Latin: twin; double).
Existing or arranged in two pairs; specifically in medicine, applied to the corpora quadrigemina of the brain, lying beneath the cerebral hemispheres.
A constellation, otherwise 'Castor and Pollux'; also the third sign of the zodiac, with which this constellation was anciently identical.
Having flowers in pairs.
Double; occurring in pairs.
Triple; pertaining to the fifth cranial nerve (nervus trigeminus); called the fifth pair of cranial nerves because of their division into three branches; also called 'trifacial'.
The condition of occurring in threes, especially the occurrence of three pulse beats in rapid succession.