ep·i·gram 
(ĕpĭ-grăm′)
(ĕpĭ-grăm′)n.
1. A short, witty poem expressing a single thought or observation.
2. A concise, clever, often paradoxical statement.
3. Epigrammatic discourse or expression.
[Middle English, from Old French epigramme, from Latin epigramma, from Greek, from epigraphein, to mark the surface, inscribe : epi-, epi- + graphein, to write; see gerbh- in the Appendix of Indo-European roots.]