petipeti, n. 1. A weed growing in freshwater lakes which affords shelter for fish and crayfish, which are therefore called kai moe petipeti. Kia whangaia mai ki te kai moe petipeti (M. 49).
2. Blechnum discolor, a fern = piupiu.
3. Jellyfish; a general name. Te tangata tuatahi he petipeti, muri atu ko nga pōpō nunui.
Williams Dictionary