Indica is not slang for marijuana, but one of the three species of marijuana; Sativa, Indica, and Reduralis. Sativa is more of a skinny, tall, lanky, and less yielding plant that produces a mind high. Whereas Indica is more of a small, broad, and usually a higher yielding plant that gives you a couchlock body high. Rederalis isn't grown due to its small amount of THC but is sometimes crossed with other species to shorten flowering time.
My Aurora Indica is budding nicely in my grow room.