(biochemistry) gastric acid

examination, exam, test / quiz

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

World Heritage Site, a place listed by UNESCO as being of special cultural or physical significance.

the Neogene period

the Paleogene period

slide rule; slipstick

cultural heritage