sciagraphy

/S IY0 AA1 G R AH0 F IY0/
noun
  1. 1

    The art of representing shadows as realistically as possible.

  2. 2

    A vertical section through a building.

  3. 3

    Radiography.

  4. 4

    The making of sundials.

Source: https://en.wiktionary.org/wiki/sciagraphy