həˈräptə(r), ˈhȯˌr- noun
( -s )
Etymology: French horoptère, from Greek horos boundary + optēr one that looks; akin to Greek opsesthai to be going to see — more at horizon , optic
: the locus of points in external space whose images are formed on corresponding places of the two retinas and which are therefore seen single
• hor·op·ter·ic |hȯˌräp|terik adjective