Canousma
The canousma, 4802000/4782969 = [4 -14 3 4⟩ is a 7-limit comma measuring about 6.9 cents. It is the difference between the sensamagic comma and the cataharry. It is also the sum of the ragisma and the hemimage, or the sum of the breedsma and the amity comma. Tempering it out leads to the rank-3 canou temperament.