- libraA Roman unit of mass, usually equivalent to 327 g.
- zygonIn the cerebrum, a short crossbar fissure that connects the two pairs of branches of a larger zygal (H-shaped) fissure.
- zyg-union
- zygapophysisOne of the articular processes of a vertebra, of which there are usually four, two superior and two inferior.
- zygo-union
- zygoteneThe intimate pairing of homologous chromosomes during the synaptic stage of meiosis