Definitions
1.NounAny of certain mouth appendages of some insects, arachnids, crustaceans, and hydrozoa; in particular:
The ventral mouthpart plate in trilobites;
The barbed attachment structure associated with the mouthparts of parasitic arachnids (e.g. ticks);
The oral tip surrounded by tentacles in hydrozoan cnidarians.
2.NounThe ventral mouthpart plate in trilobites;
3.NounThe barbed attachment structure associated with the mouthparts of parasitic arachnids (e.g. ticks);
4.NounThe oral tip surrounded by tentacles in hydrozoan cnidarians.