Exactly, Just
adverb, noun, な adjective
Okay, we're going to cheat a little bit to remember the meaning of this word. Let's say you take the temperature of the street. It is exactly one hundred degrees. That's exactly what it is. Just 100 degrees, not one degree more or less. You put your eggs on the street and watch them cook.
ちょうど
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
丁度、おふろから出たところです。
I just got out of the bath.
この服の大きさが丁度いいです。
The size of these clothes is just right.
丁度その本を探していたんです。
I was just looking for that book.
あら！今丁度あなたに電話をしようと思っていたところよ！
Oh! I was planning to call you just now!