Tropic of __, Line Running at 23 Degrees N
Puzzle 18 of Secondhand Treasures Pack
Question is: Tropic of __, Line Running at 23 Degrees N
and the answer is: CANCER
Word Meaning:
CANCER — (medicine, oncology, pathology) A disease in which the cells of a tissue undergo uncontrolled (and often rapid) proliferation.
Definitions from Wiktionary.