(n.) A dynamo-electric machine.

activator adductor amateur athlete approach archer athlete attractant attrahent average axiom axis balance ballplayer baseballer baseman batter battery blocking back bosom bowman catcher center of action center of attraction center of gravity center on center round centermost central centralize centrist centroid centrum close close in close up close with coach come together competitor compromise concenter concentralize concentrate converge core cricketer cynosure dead center deepest recesses defensive lineman diameter diaphragm dynamo elixir end energizer epicenter equator equidistant essence essential fall in with fence flower focal point focus footballer fundamental funnel games-player gamester generality gist golden mean gravamen guard half measures half-and-half measures halfway halfway measures happy medium heart heart of hearts hub hypostasis infielder inner inner essence inner landscape inner life inner man inner nature inner recess inner self inside interior interior man intermediary intermediate intern internal intersect intrados inward jock jumper juste-milieu kernel lineman lure marrow mean meat medial median mediocrity medium medulla meet metacenter mid middle middle course middle ground middle point middle position middle state middle way middle-of-the-road middle-of-the-roader middlemost midmost midpoint midriff midst moderantism moderantist moderate moderate position moderateness moderation moderationist moderatism moderatist narrow the gap nave navel nerve center neutral ground nip norm normal nub nucleus nuts and bolts offensive lineman omphalos outfield outfielder par penetralia pinch pith pivot player polestar poloist postulate principle professional athlete pugilist quarterback quick quid quiddity quintessence racer recesses root rule run run together sap seat secret place secret places skater soul spirit sport sportsman stimulant storm center stuff substance tackle tailback taper the nitty-gritty thick thick of things third force toxophilite umbilicus unite via media vital center vitals waist waistline wingback wrestler zone