peculiarity

noun, plural pe·cu·li·ar·i·ties.

1. a trait, manner, characteristic, or habit that is odd or unusual.
2. oddity; singularity; eccentricity.
3. a distinguishing quality or characteristic.
4. the quality or condition of being peculiar.

noun plural -ties

1. a strange or unusual habit or characteristic
2. a distinguishing trait, etc that is characteristic of a particular person; idiosyncrasy
3. the state or quality of being peculiar

n.c.1600, “exclusive possession;” 1640s, “special characteristic,” from peculiar + -ity, or else from Latin peculiaritas. Meaning “an oddity” is attested by 1777. Related: Peculiarities.