Oligodactyly is a condition in which children are born with fewer than ten fingers or ten toes. The image at left is of the hands a person with just four digits on their right hand.
It is worth noting that cartoon characters are very frequently drawn with four digits on each hand, which makes them oligodactyl, too!
You may read more about oligodactyly in this Wikipedia article or simply search for more information using Google.
How I wish you could be my professor – I have been having a consistent problem with the chain rule for what seems like weeks. I couldn’t grasp it at all. The first couple minutes of your video – it all instantly clicked for me. You are a life saver and a wonderful teacher. Thank you so much for your explanations!!!!!!!
Taikrys (on a CCM YouTube video about the Chain Rule)
See all Testimonials