Definition that contains family cycadaceae
- genus dioon small genus of arborescent cycads of Mexico and Central America; sometimes classified in family Cycadaceae
- zamiaceae a family of cycads often included in the family Cycadaceae: zamias
- genus encephalartos genus of arborescent African cycads; sometimes classified in family Cycadaceae
- family zamiaceae a family of cycads often included in the family Cycadaceae: zamias
- genus macrozamia genus of large evergreen Australian cycads; sometimes classified in family Cycadaceae
- genus ceratozamia small genus of Mexican cycads; sometimes classified in family Cycadaceae
- zamia family a family of cycads often included in the family Cycadaceae: zamias