Astr- denotes which meaning?

Astr- denotes which meaning?

• A. Rainbow
• B. Lung
• C. To Eat
• D. Star-Shaped

Answer: (D)

Astr- comes from the Greek astron meaning star. In medical and scientific terms, this combining form signals a relation to stars, and it’s also used to describe shapes that resemble a star. That star-like sense is why the meaning highlighted is star-shaped—the term is pointing to a form that radiates like a star. The other options come from different roots (for example, a rainbow relates to color phenomena, the lung to pulmon-, and to eat to phag- or vore-), so they don’t match the astr- group.

Astr- comes from the Greek astron meaning star. In medical and scientific terms, this combining form signals a relation to stars, and it’s also used to describe shapes that resemble a star. That star-like sense is why the meaning highlighted is star-shaped—the term is pointing to a form that radiates like a star. The other options come from different roots (for example, a rainbow relates to color phenomena, the lung to pulmon-, and to eat to phag- or vore-), so they don’t match the astr- group.