noun a group or set of four
In mathematics, a tetrad can refer to a set of four numbers or objects.
In astronomy, a tetrad refers to a series of four total lunar eclipses that occur in a row with no partial lunar eclipses in between.
In chemistry, a tetrad refers to a group of four elements that have similar chemical properties.
In genetics, a tetrad refers to a group of four chromatids that are formed during meiosis.
In art and design, a tetrad refers to a color scheme using four colors that are evenly spaced on the color wheel.
In literature, a tetrad is a group of four related works or elements.
In psychology, a tetrad can refer to a group of four personality traits or behaviors.
In biology, a tetrad is a group of four cells formed during meiosis.
In chemistry, a tetrad can refer to a group of four elements in the periodic table.
In mathematics, a tetrad can refer to a group of four numbers or variables.
In astronomy, a tetrad can refer to a group of four celestial objects aligned in a specific way.