TITLE: Name of shape with constant distance to a line segment
QUESTION [12 upvotes]: For a computer graphics problem I have a shape that is defined by a constant distance to a line segment:

I tried to find a name for this shape, but my Google skills have failed me. Does it have a dedicated name?

REPLY [3 votes]: Another name is obround, which can be a noun or adjective.

ob-
(non-productive) Against; facing; a combining prefix found in verbs of Latin origin.

Example from manufacturing: