Definition of superjacent in English:
 superjacent
adjective ˌsuːpəˈdʒeɪs(ə)ntˌsupərˈdʒeɪs(ə)nt
technical Lying over or above something else; overlying.
 Example sentencesExamples
-  It was probably deposited in deeper water environments than the underlying Fairview Formation and the superjacent Bellevue strata but probably in shallower water environments than most of the Kope Formation.
 -  Higher in the Sheinwoodian Slite Group and in the superjacent Homerian Mulde Formation, morphotype C appears which has a distinctly enlarged first denticle succeeding the fang.
 -  The taxonomic diversity is higher than in the underlying Kope Formation and the superjacent upper Arnheim-lower Waynesville interval.
 -  The top of the P. undatus zone is defined by the first occurrence of Plectodina tenuis, the name bearer of the superjacent zone.
 
Origin
  
Late 16th century: from Latin superjacent-, from super- 'over' + jacere 'to lie'.
   Definition of superjacent in US English:
 superjacent
adjectiveˌso͞opərˈjās(ə)ntˌsupərˈdʒeɪs(ə)nt
technical Lying over or above something else; overlying.
 Example sentencesExamples
-  The top of the P. undatus zone is defined by the first occurrence of Plectodina tenuis, the name bearer of the superjacent zone.
 -  It was probably deposited in deeper water environments than the underlying Fairview Formation and the superjacent Bellevue strata but probably in shallower water environments than most of the Kope Formation.
 -  The taxonomic diversity is higher than in the underlying Kope Formation and the superjacent upper Arnheim-lower Waynesville interval.
 -  Higher in the Sheinwoodian Slite Group and in the superjacent Homerian Mulde Formation, morphotype C appears which has a distinctly enlarged first denticle succeeding the fang.
 
Origin
  
Late 16th century: from Latin superjacent-, from super- ‘over’ + jacere ‘to lie’.