Definition that contains haet
- worm any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes; also many insect larvae
- ladin a Rhaeto-Romance dialect of Romansh spoken in southeastern Switzerland
- friuli a Rhaeto-Romance dialect spoken in northeastern Italy
- chaetodon any fish of the genus Chaetodon
- genus phaethon type genus of the Phaethontidae
- phaethon type genus of the Phaethontidae
- friulian a Rhaeto-Romance dialect spoken in northeastern Italy
- archiannelid small primitive marine worm lacking external segmentation and resembling polychaete larvae
- genus sagitta chief genus of Chaetognatha including the largest arrowworms
- rumansh the Rhaeto-Romance language spoken in southeastern Switzerland; it is an official language of Switzerland