In organic chemistry, a cycloalkane is a compound with a structure in which carbon atoms are linked in a ring.

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He is suffering from the misery brought by literacy.

The chromatophores of a frog play an important role in changing its body color.

A back vowel is a sound where the back of the tongue approaches the palate.

Back vowels are vowels that are pronounced using the back of the tongue.

The Kokin Wakashū is the second collection of the Chokusen Wakashū.

Tokudaiji Sanesada, also known as Goto Tokudaiji Sadaijin, was a court noble and a literary person during the Heian period.

He is doing special exercises to strengthen his tibialis posterior muscle.

Strengthening the occipitalis muscle can reduce neck pain.