A pre-Socratic Greek philosopher from Miletus in Asia Minor.

(geometry) A theorem stating that if A, B, and C are distinct points on a circle where the line AC is a diameter, the angle ABC is a right angle.

A plant of the species Arabidopsis thaliana, native to Eurasia.

plural of thale cress

Of or relating to Thales of Miletus (c.624–c.546 BC), pre-Socratic Ancient Greek philosopher who attempted to explain natural phenomena without reference to mythology, and who applied geometry to mathematical problems.

(Greek mythology) The queen of the Amazons, said to have brought 300 women to Alexander the Great, hoping to breed a race of children as strong and intelligent as he.

(very rare) The philosophy of Thales of Miletus.