lines through 1st and 3rd base indicating the boundaries of a baseball field | the area of a baseball field that is enclosed by 3 bases and home plate |
a line across a bowling alley that a bowler must not cross | a playing card in the minor suit that has one or more red rhombuses on it |
a line from which basketball players take penalty shots | the baseball playing field |
| a transparent piece of diamond that has been cut and polished and is valued as a precious gem |
| a parallelogram with four equal sides; an oblique-angled equilateral parallelogram |
| very hard native crystalline carbon valued as a gem |