horse·tail 
(hôrstāl′)
(hôrstāl′)n.
Any of various nonflowering plants of the genus Equisetum, having a jointed hollow stem and narrow, sometimes much reduced leaves. Also called equisetum.
- carpal tunnel
- carpal tunnel syndrome
- car park
- Carpathian Mountains
- carpe diem
- carpel
- carpellary
- carpellate
- Carpentaria
- carpenter
- carpenter ant
- carpenter bee
- Carpentier
- carpentry
- carper
- carpet
- carpetbag
- carpetbagger
- carpetbaggery
- carpetbagging
- carpet beetle
- carpet-bomb
- carpet-bombing
- carpet grass
- carpetgrass