Term: heterostracan: extinct jawless fish with the anterior part of the body covered with bony plates; of the Silurian and Devonian
Broader: jawless vertebrate: eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms | Unrelated: economy: the efficient use of resources
Broader: jawless vertebrate: eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms | Unrelated: carrier: someone whose employment involves carrying something
Broader: jawless vertebrate: eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms | Unrelated: concentration: complete attention; intense mental effort
Broader: jawless vertebrate: eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms | Unrelated: euphonium: a bass horn (brass wind instrument) that is the tenor of the tuba family
Broader: jawless vertebrate: eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms | Unrelated: cicada killer: large black or rust-colored wasp that preys on cicadas
Broader: jawless vertebrate: eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms | Unrelated: obstructionist: someone who systematically obstructs some action that others want to take
Broader: jawless vertebrate: eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms | Unrelated: acuteness: a quick and penetrating intelligence
Broader: jawless vertebrate: eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms | Unrelated: demur: (law) a formal objection to an opponent's pleadings
Broader: jawless vertebrate: eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms | Unrelated: symposium: a meeting or conference for the public discussion of some topic especially one in which the participants form an audience and make presentations
Broader: jawless vertebrate: eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms | Unrelated: spatter: the noise of something spattering or sputtering explosively