Douglas Harper's Etymology Dictionary
axonometric
1869, from axonometry (1865), from Greek axon (see axis) + metria "measurement" (see -metry).
Wiktionary
axonometric
a. (context technical drawing English) Describing a projection in which the horizontal and vertical axis are to the same scale, but the third axis is reduced to allow for perspective
Wikipedia
Usage examples of "axonometric".
Apparently, the two had been in touch about it on the telephone, because Henry came equipped with a model and axonometric drawings.