camel case
or cam·el·case, Cam·el·Case
noun
the convention of writing compound words or phrases with no spaces and an initial lowercase or uppercase letter, with each remaining word element beginning with an uppercase letter: iPod and WikiAnswers are both spelled in camel case.
Origin of camel case
in reference to the capital letter creating a hump in the series of letters
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019