Bruits Wave (ブルーツ波, Burūtsu-ha; FUNimation "Blutz Waves", Viz "Green-spectrum radiation") is a special radiation emitted from large satellites such as Earth's Moon, when they are full and reflect the light of their nearby star. Bruits Waves are measured in "zenos" per second (Z.P.S.) by the Saiyans. These radiation waves are always emitted from these planetary bodies, however, no matter how large the body is, it cannot exceed 17 million Z.P.S. unless the planetary body is full. It is possible, however, for a moon that is almost full to still reach the required 17 million Z.P.S. if the Saiyan stares long enough.
Bruits Waves are important to the Saiyan species, as, when a Saiyan absorbs 17 million Z.P.S. through their retinas, it reacts with a gland in their tail, and they transform into a Great Monkey.
Only in the anime, Bulma was capable of inventing a Bruits Wave Generator, artificially producing Bruits Waves to induce a Giant Monkey Transformation. Additionally, rather than a full moon, Gokū used the "full Earth" to transform in the anime during his battle with Baby.
Similarly to the word "Saiyan" being a pun on "yasai" (やさい), the Japanese word for "vegetable", and all Saiyans having names that are puns on various vegetables, Bruits Wave is a pun on "fruits" (フルーツ, furuutsu), another kind of produce.