Drawing for a House Design
This page is the CodyCross answer for the clue below from Prehistory, Group 1242, Puzzle 4 (Geologic Time Scale).
Question is: Drawing for a House Design
and the answer is: BLUEPRINT
Word Meaning:
BLUEPRINT — A type of paper-based reproduction process producing white-on-blue images by means of a photosensitive ferric compound, used primarily for technical and architecture's drawings, now largely replaced by other technologies.
Definitions from Wiktionary.