(chemistry, organic chemistry) polymer

Japanese pseudo-anglicisms: Japanese coinages using English roots, not in use in anglophone countries nor by English native speakers, but only by speakers of Japanese

(physics) short for 原子核融合 (genshikaku yūgō): (atomic) nuclear fusion / (biology) karyogamy, the fusion of cellular nuclei when a sperm cell meets an egg cell

(physiology) the speech center

extra (extra edition of a newspaper)

twins

origin of a word or phrase; etymology

language study / linguistics

meeting

(rare) shield (anything which protects or defends)