Meanings

streptococcus

balancing on a ball

baseball all-star game

spherical mirror

ball lightning

(pitcher's) stuff

cone

the baseball world

spherical geometry

eye bank

high-school baseball

waiting for a good hit at a pitch

batting eye

land hemisphere

erythrocyte sedimentation rate

smoking pitch

ball which is hard to hit or catch

good pitch (to hit)

lymphocyte

eyeball