Luxuriant head of hair is a term used to describe a full, thick, and healthy head of hair. The term can be broken down into two parts: 'LUXURIANT' and 'MANE'. LUXURIANT means 'rich and sumptuous in appearance, quality, or enjoyment', while MANE refers to the long, thick hair that grows around the neck and shoulders of certain animals, such as horses. Together, these two words describe a head of hair that is full, thick, and healthy.