What does scutum mean?
The scutum is a technical term for a broad, flat, protective structure. In human anatomy, it refers to the sternum, or breastbone, which forms the front of the chest and protects part of the trunk while providing attachment points for muscles and ligaments. The word is more commonly encountered in comparative anatomy, where it can describe one of the large, shield-shaped plates covering the body of reptiles and some other animals. Its name comes from Latin, where scutum meant “shield,” an apt comparison for both the breastbone and an animal’s protective plate. Although everyday speakers usually say “breastbone,” “sternum,” or “plate” depending on context, scutum remains valuable in biological and medical terminology because it identifies structures according to their form and protective function.
A broad, flat bone forming the front of the thorax; in humans, the sternum or breastbone.
"The scutum forms the anterior portion of the thoracic cage."
A formal anatomical term; “breastbone” and “sternum” are the usual everyday equivalents.
One of the shield-like plates covering the body of a reptile or other animal.
"Each scutum overlaps the one behind it."
Used chiefly in zoology and comparative anatomy.
The standard plural in anatomical and zoological usage is scuta.
"The scuta cover the turtle’s back."
The word scutum, Latin for “shield,” survives in anatomy because the breastbone forms a protective shield across the chest.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does scutum come from?
Scutum comes from Latin scutum, meaning “shield.” The Latin word was borrowed into English for anatomical structures resembling or functioning as shields, including the breastbone and certain animal plates. Related English forms include scute, scutellum, scutiform, and scutate, all reflecting the same protective or shield-like sense.
Related word forms
How scutum is actually used
In human anatomy, “scutum” is a formal or comparative anatomical term for the sternum. In zoology, it refers more broadly to a shield-like plate and may be used for similarly shaped structures in other animals.
Easily confused with scutum
A scutum is a large anatomical plate or bone, whereas a scute is generally a smaller shield-like plate, especially on the skin of reptiles.