What does trilobed mean?
Trilobed is an adjective meaning divided into three lobes, or having three projecting or rounded sections. The word is especially useful in describing the forms of leaves, petals, organs, shells, and other natural structures, as in “trilobed leaves” or “a trilobed organ.” Its meaning is primarily visual and geometric: it identifies a structure that can be understood as having three distinct lobes without requiring the reader to interpret their function. In botanical and biological writing, trilobed is more precise than simply saying “three-parted,” because it emphasizes rounded, divided, or projecting sections. The term can also appear in paleontology and anatomical description when a form has three conspicuous lobes. It is not limited to a particular regional variety and is understood in both British and American English. Trilobed is therefore a compact, technical-sounding adjective that makes descriptions of natural forms more vivid and exact.
adjectiveHaving or consisting of three lobes. It commonly describes leaves, petals, organs, or other structures divided into three rounded or projecting parts.
- Having three lobes, especially in botany, zoology, or descriptive anatomy.
"The plant has delicate, trilobed leaves that turn copper in autumn."
"Each flower has five petals, though the central one is distinctly trilobed."
"The trilobed organ is characteristic of several species in the genus."
Trilobed is a compact visual instruction: if a form is divided into three parts, it is trilobed.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does trilobed come from?
The word was formed in English by combining the prefix tri-, meaning “three,” with lobed, meaning “having lobes.” Lobed derives from lobe, which comes through Latin from a Greek word associated with a lobe or pod. The related forms trilobate and trilobated are older and more technical variants of the same idea.
How trilobed is actually used
This is a descriptive and relatively formal term, especially common in botany, biology, paleontology, and anatomy. It is normally used for a shape divided into three distinct lobes rather than for an object that merely happens to have three separate parts.
Easily confused with trilobed
A trilobite is an extinct marine arthropod with a segmented body, whereas trilobed describes anything having three lobes or divisions.