iegel ▁( or ▁Sp ieg hel ), ▁name ▁sometimes ▁written ▁as ▁Ad rian us ▁Sp ig el ius , ▁( 1 5 7 8 ▁– ▁ 7 ▁April ▁ 1 6 2 5 ) ▁was ▁a ▁F lem ish ▁an atom ist ▁born ▁in ▁Br uss els . ▁For ▁much ▁of ▁his ▁career ▁he ▁pract iced ▁medicine ▁in ▁Pad ua , ▁and ▁is ▁considered ▁one ▁of ▁the ▁great ▁phys icians ▁associated ▁with ▁the ▁city . ▁At ▁Pad ua ▁he ▁studied ▁an atom y ▁under ▁Gi rol amo ▁Fab r ici . ▁ ▁Work ▁His ▁best ▁written ▁work ▁on ▁an atom y ▁is ▁De ▁hum ani ▁corpor is ▁fab rica ▁lib ri ▁X ▁tab ul is ▁a ere ▁ic isis ▁ex orn ati , ▁published ▁post hum ously ▁in ▁ 1 6 2 7 . ▁He ▁borrow ed ▁the ▁title ▁from ▁De ▁hum ani ▁corpor is ▁fab rica , ▁written ▁by ▁his ▁fellow ▁coun tr yman , ▁V es al ius , ▁who ▁had ▁also ▁studied ▁in ▁Pad ua . ▁The ▁book ▁was ▁intended ▁as ▁an ▁update ▁in ▁medical ▁thinking ▁( a ▁century ▁later ) ▁about ▁an atom y . ▁In ▁his ▁ 1 6 2 4 ▁treat ise ▁De ▁sem it ert iana ▁lib ri ▁qu atu or , ▁he ▁gave ▁the ▁first ▁compreh ensive ▁description ▁of ▁mal aria . ▁▁ ▁His ▁name ▁is ▁given ▁to ▁the ▁Sp iegel ian ▁line ▁( Line a ▁sem il un aris ) ▁and ▁the ▁Sp iegel ian ▁fas cia , ▁which ▁refers ▁either ▁to ▁the ▁combined