tetrad

• Nom désignant le nombre quatre ou un groupe de quatre objets, personnes ou unités. Peut aussi se référer à un ensemble de quatre éléments groupés, notamment dans des contextes techniques ou savants.

A noun referring to the number four, or a group or set of four things.

1. Group of fourC1formal

   A set or collection of four things, people, or elements.

   groupe de quatre

   • The four musicians formed a tetrad for the performance.
   • In biology, a tetrad refers to a group of four cells.
   • The tetrad of seasons includes spring, summer, autumn, and winter.

   Synonymesfoursomequadquadrumviratequadruplequartet

2. Number fourC1formal

   The cardinal number that is the sum of three and one.

   quatre

   • The tetrad is often considered a symbol of stability.
   • In many cultures, the tetrad represents completeness.
   • The number four, or tetrad, appears frequently in ancient texts.

   Synonymesfourfoursomequadrupletquartetquaternionquaternity