acrophobicadj.

1888 A. Verga in Jrnl. Insanity Oct. 289 If it is true that a certain pope refused..to be enthroned, on a gestatory seat, in the midst of sacred fans, and preferred the humble and prosaic sedan chair, I would say that the holy father was still more acrophobic than I am.

1959 New Yorker 24 Oct. 34/3 We walked over to the winding parapet,..took a shuddering, acrophobic look down the well.

1994 New Scientist 11 June 6/1 Lamson recruited 60 acrophobic Californians by advertising in local newspapers. He assigned them at random to be treated either by traditional methods, with the drug Ativan for example, or by virtual therapy.