Heliotropes- Plants and Zonker podcast
9 Aug 2005
While putting together yesterday’s podcast on zoetrope I came across today’s word- heliotrope. Heliotrope is a noun with several definitions. One is a purple or violet color. Another heliotrope is a surveying tool for civil engineers and map makers. It allows them to focus a beam of sunlight and signal a fellow surveyor up to [...]