Anyone recognize the image? If you were thinking Wikipedia, you are correct. While online dictionaries such as ALC are handy, as are electronic dictionaries and even paper dictionaries, Wikipedia is more precise. Find what you want in English and then pray that it has an equivalent entry in Japanese. Not only do you get the word itself, you get a whole page full of Japanese explaining the history of the thing and, if that thing happens to be athlete’s foot, how to get rid of the thing. That adds up to a lot of practice reading and a huge bump in your vocabulary. Reading one medium-to-long Wikipedia entry per day would be a really effective study strategy.
Apparently athlete’s foot is 足白癬 (あしはくせん) in Japanese, although for some reason that won’t 変換 properly. That might be because the vernacular is 水虫 (みずむし) – water bug. Damn that rainy season and this never-ending summer. I’ll be making a trip to Matsumoto Kiyoshi today.