Judging from various posts that I've read, it seems apparent that many patrons are unaware of the proper names for the different kinds of stripes worn by enlistedmen. As far as I know, this list is accurate, but if anyone thinks they know better, I'd appreciate any corrections.
Chevron: the standard arrow-like stripe, pointing upwards.
Rocker: A chevron, pointing downwords.
Arc: A curve attached to chevrons or rockers, can point up or down
Bar: "Stripes" worn by officers on epaulets or around sleeve cuffs, usually
gold but sometimes silver. Also refers to US company-level officer
insignia.