🪶 A bird's wing feather 3️⃣ Third in order

tertial

9.9

Third in order or relating to a third part

adjective
/ˈtɜrʃəl/

: terciario

The report was divided into primary, secondary, and tertial sections for clarity.

Examples

Each tertial phase of the project builds on the previous two stages.
In a three-part series, the tertial episode is the most intriguing.
The report was divided into primary, secondary, and tertial sections for clarity.
In the new curriculum, students progress from basic to advanced and finally to tertial modules.
The tertial layer of the building is often overlooked.
Each tertial phase of the project builds on the previous two stages.
In a three-part series, the tertial episode is the most intriguing.

Synonyms

third

vstertial

310 1.0

The person or thing in the position after the second in a list

relates to one of three parts or levels rather than a place in a list

tertiary

vstertial

12 6.4

Third in order after the second

is the general label for anything relating to one of three parts or levels

tertile

vstertial

Specialized

8.5

Relating to one of three equal groups in a set of data

is about one of three parts or levels across contexts, not only equal partitions

Surface Forms

tertial positive

Morphology

tertial = tertiary (semi-transparent) = tert + ial

The suffix '-ial' is a common adjectival suffix, but the root 'tert' is not a standalone English word, making it less transparent.

Etymology

Tertial comes from the Latin tertius meaning 'third', the same idea you see in tertiary. So a tertial part is the 'third' level or the third part in a series.