An Old Seaman

I received an SMS from a friend. It's a riddle that goes like this:

An old seaman went to a drugstore to buy something. How did he describe this something?

Like this:

"3 quarter of a cross,

and a circle complete.

2 semi circles and perpendicular meet.

An equilateral triangle standing on 2 feet,

2 semi circles and a circle complete."

What is the old sailor trying to buy?

As far as I know, 2 out of 100 people get it.