What century did "shampoo" acquire its modern meaning of "washing the hair"?

• 17th century
• 18th century
• 19th century
• 20th century
• 21st century

The word "shampoo" was exclusively used for hair washing upon its introduction to Britain.

When was the word "shampoo" introduced to Britain by British traders in India?

• 16th century
• 17th century
• 18th century
• 19th century
• 20th century

"Shampoo" took on the meaning of "___ ___ ___ ___ ___" in the 19th century besides hair washing.

• a special soap for hair