(mathematics) intuitive geometry, study of properties in geometry based on intuition, using methods such as observation, measurements, and drawing.

(mathematics) study of properties in geometry based on arguments and proofs instead of intuition.

(physics) geometrical optics

birds of a feather flock together

someone of that type, someone who does that

person

Modern Greek - the Greek language as spoken since the 16th century

the Hellenic Republic

spouse

a fourspine sculpin (species Cottus kazika); very similar to the kajika (see below), but larger