Chipotle

n. hot chilli pepper or jalapeno that has been dried (used in Mexican cooking)

Chipotles (pronounced chee-POTE-lays) are smoke-dried jalapeño chilis used primarily in Mexican and Mexican-inspired cuisine.There are many varieties of jalapeños which vary in size and heat. In Mexico, the jalapeño is also known as the cuaresmeño and gordo. Until recently, chipotles were almost exclusively found in the markets of central and southern Mexico. As Mexican food became more popular in the United States in the late 20th century, jalapeño production and processing began to move into Northern Mexico and the United States.
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Noun
1. a ripe jalapeno that has been dried for use in cooking
(hypernym) jalapeno, jalapeno pepper

Smoked dried jalapeno chiles. The distinctive smoky heat of chipotles is used to flavor Southwestern and Mexican dishes. They are sold both dried and in cans, in a vinegary sauce called adobo. Most big supermarkets carry them, but a Latin-American market is your best bet.