n.
Pronunciation: ˌ f ō -t ə - ' gra-m ə -tr ē
Function: noun
Etymology: International Scientific Vocabulary photogram photograph (fr. phot- + -gram ) + -metry
Date: 1875
: the science of making reliable measurements by the use of photographs and especially aerial photographs (as in surveying)
– pho · to · gram · met · ric \ -gr ə - ' me-trik \ adjective
– pho · to · gram · me · trist \ - ' gra-m ə -trist \ noun