A type of highly-prized playing marble made of agate or variegated glass resembling agate.

Recorded earliest in attributive use.

1An agriculturalist, specifically a student at an agricultural college. Frequently (and in earliest use): a member of a sports team from such a college; (in plural) the team itself.

2An agricultural institution or college (often as the nickname of a specific institution).

Of or belonging to an Aggy or Aggies; relating to an agricultural college, department, team, etc.