The term 'I, to Einstein' can be solved by the crossword solutions of 'iodine' (6 letters) and 'ich' (3 letters). Iodine is a chemical element with atomic number 53 and symbol I. It is an essential trace element for humans and animals, and is used in various medical treatments. Ich, on the other hand, is a common name for the parasite Ichthyophthirius multifiliis, which is a protozoan that causes a disease known as white spot disease in fish.