noun (common) (futsuumeishi) núcleo;columna vertebral;médula

noun (common) (futsuumeishi) nucleus;backbone;mainstay;key figure

nouns which may take the genitive case particle 'no'noun (common) (futsuumeishi) medium-level;mid-level;middle-ranking;midsize

noun (common) (futsuumeishi) main body (of troops);crack troops;select troops

noun (common) (futsuumeishi) baseball center field;centre field;center fielder;centre fielder

noun (common) (futsuumeishi) athlete competing in the middle-number match in a team competition, i.e. second in 3-on-3, third in 5-on-5 (kendo, judo, etc.)