Left-hander (noun)

1. A person who is left-handed.
2. A pitcher or other player who throws left-handed.

Origin:

Left-handed + -er.

Examples:

1. He is a left-hander and writes with his left hand.
2. Left-handers make up about 10% of the population.
3. The left-hander was having trouble throwing strikes.
4. Left-handers are often at a disadvantage in sports that favor right-handers.
5. The team had a few left-handers in the lineup which made it difficult for the opposing team.