A class representative, in the context of an elementary school or junior high school.

超伝導: superconductivity

節足動物: arthropod (animal of Arthropoda)

同音異義語: a homophone (words with the same pronunciation)

動物学: zoology

高速道路: highway

陰陽道: a traditional body of Japanese esoteric cosmology; a mixture of natural sciences and occultism, based on the Chinese philosophies of Wu Xing and Yin and Yang.

異口同音: in concert

鎖分銅: a chain with a weight on one or both ends, such as might be used on a pulley to help lift loads; a Japanese martial arts chain weapon, consisting of or based on such a weighted chain

浮動票: swing vote