What does striae mean?
Striae is the plural of stria and means narrow lines, grooves, ridges, or bands on a surface. The term is especially common in technical descriptions of anatomy, where it can refer to fine parallel bands in tissues such as the retina, and in geology, where it describes scratches or grooves on rock surfaces. Glacial striae are parallel markings created by debris carried within moving ice and can help reconstruct the direction of past glacial movement. Striae is more formal and specialized than the general words lines, bands, grooves, or streaks. When speaking about an individual marking, the singular stria is used; striae is the normal plural form in both British and American English.
noun (plural)Striae are narrow lines, grooves, or bands on a surface, especially parallel markings. In anatomy and geology, the term refers to distinct striations or streaked structures.
- Narrow lines, grooves, or bands on a surface.
- Fine parallel markings on rocks or minerals, often indicating a natural directional process such as glacial movement.
- Anatomical bands or streaks, especially in structures such as the retina or skin.
"Fine striae on the exposed rock reveal the direction of ancient flow."
"The fossil's surface is covered with delicate striae."
"Doctors examined the striae in the retina to assess the patient's condition."
Striae is already the standard plural of stria. The singular is stria.
"The stone bears numerous striae."
The grooves on glaciers, called glacial striae, are scratches left by rocks embedded in moving ice, revealing the movement of ice long after it has gone.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does striae come from?
Striae comes from the Latin noun stria, meaning a groove or furrow, with its plural striae formed according to the regular Latin pattern. English borrowed the singular form in the 17th century and later developed related adjectives such as striate and striated, meaning marked with lines or grooves. The geological and anatomical senses developed from the original idea of a linear marking or furrow.
Related word forms
How striae is actually used
Striae is a formal or technical term, most often used in anatomy, biology, and geology. It is normally plural; in anatomy, it can also refer to several parallel ridges or bands within a larger structure.
Easily confused with striae
Stria is the singular form of striae, while striae is the plural.