He is an expert in osteology and has a deep knowledge of the human skeleton.

He is a world-renowned osteologist.

He is an expert in osteology.

The cytosol is the liquid part inside the cell, and many enzymatic reactions occur here.

Amorphous substances have characteristics different from crystals.

The grey matter of the brain is the central part of information processing.

He has psychopathy, making it difficult for him to understand social rules.

In Sanskrit phonology, retroflex sounds play an important role.

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.