Tetragoniaceae tet·ra·go·niaceae uncommon noun 1. succulent herbs or small shrubs mostly of South Africa but also New Zealand and North America: carpetweeds; fig marigolds SynonymsAizoaceaefamily Aizoaceaefamily Tetragoniaceaecarpetweed family Related words Broader terms caryophylloid dicot family Parts Caryophyllales Part of CarpobrotusDorotheanthusgenus LithopsMesembryanthemumMollugaPleiospilosTetragonia WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.