This is the 8914th most frequent French word.
caractéristique
Characteristic.
In this sentence, "caractéristique" is used as a noun referring to a distinctive attribute or feature of the plant, its ability to glow.
Cette plante a une caractéristique unique : elle brille sous la lumière ultraviolette.
This plant has a unique characteristic: it glows under ultraviolet light.
Here, "caractéristique" functions as an adjective describing a typical trait or behavior of the group: teamwork.
Il est caractéristique de ce groupe de travailler en équipe constamment.
It is characteristic of this group to work in teams constantly.
In this example, "caractéristique" acts as a noun denoting a defining quality or feature of her personality: gentleness.