Ang obal, obalo, o habilog ay isang hugis na kahugis ng itlog. Tinatawag din itong "biluhaba", "talinghaba", elipse, tighaba, at hawas.[1] Nagmula ang katawagang obal at obalo mula sa Lating ovum, na may ibig sabihing "itlog".
![Thumb](http://upload.wikimedia.org/wikipedia/commons/thumb/f/f3/Oval1.svg/320px-Oval1.svg.png)
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