What does acrodont mean?
An acrodont is an animal—most commonly a lizard—in which the teeth are fused directly to the crest, or upper edge, of the jawbone rather than being rooted in individual sockets. The term derives from Greek roots meaning 'highest' and 'tooth,' reflecting the position of the teeth at the very top of the jaw. Acrodont dentition is a defining characteristic of certain reptile groups, notably agamid lizards and chameleons, and contrasts with two other arrangements: pleurodont dentition, in which teeth attach to the inner side of the jaw, and thecodont dentition, in which teeth sit in deep sockets. Because acrodont teeth have no roots anchoring them in bone, they are generally not replaced when lost or worn down, so older individuals may show considerable tooth wear. The word appears almost exclusively in scientific writing on herpetology, anatomy, and paleontology, where precise classification of tooth attachment is essential for identifying species and tracing evolutionary relationships among reptiles.
An animal, especially a lizard, whose teeth are fused to the crest of the jawbone rather than set in sockets.
"Among squamate reptiles, agamids and chameleons are classic examples of acrodonts."
Used mainly in herpetological and anatomical contexts.
Relating to or characterized by teeth attached to the summit of the jawbone.
"The fossil jaw showed clear acrodont tooth attachment along its dorsal margin."
Standard English plural; refers collectively to animals possessing acrodont dentition.
"Most acrodonts show progressive tooth wear as they age, since their teeth are not replaced."
Some lizards never replace their teeth — because as acrodonts, their teeth are fused straight onto the jawbone itself.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of acrodont
The word 'acrodont' comes from the Greek 'akros,' meaning 'highest' or 'at the tip,' combined with 'odous' (stem 'odont-'), meaning 'tooth.' It was coined in nineteenth-century zoological literature to describe the distinctive tooth attachment seen in certain lizards. The same Greek root 'akros' appears in words such as 'acropolis' and 'acrobat,' while 'odous' underlies terms like 'orthodontics' and 'mastodon.'
How acrodont is actually used
Primarily a technical term used in herpetology, comparative anatomy, and paleontology; rare in general conversation. It functions chiefly as a noun but is frequently used attributively (as in 'acrodont dentition').
Easily confused with acrodont
A pleurodont has teeth fused to the inner side of the jawbone, whereas an acrodont's teeth sit atop the jaw's crest.
A thecodont has teeth rooted in bony sockets, unlike an acrodont, whose teeth lack sockets entirely.