Chūdan

Chūdan (中段) is one of the three heights commonly referred to in Japanese martial arts. It roughly means "middle level", and refers to the space above and including the waist, and below but not including the shoulders. The most common strikes to the chūdan area target either the solar plexus or floating ribs. ...
Found on http://en.wikipedia.org/wiki/Chūdan

Chudan

Aikido term: Middle level eg chudan tsuki - strike to the abdomen
Found on http://www.encyclo.co.uk/visitor-contributions.php

Chudan

Middle Level
Found on http://www.wadoryu.co.uk/horsham_karate_glossary.php

chudan

middle level
Found on http://www.cocoabeachkarate.com/glossary.html

Chudan

Middle area
Found on http://www.lyon-karate.com/karate_terms_glossary.php

Chudan

Below the shoulders / body / torso
Found on http://www.blackpoolkarate.com/japanese_names_karate.htm

CHUDAN

Mid-section. During the practice of KIHON IPPON KUMITE (one step basic sparring), the attacker will normally announce where he/she will attack JODAN, CHUDAN, or GEDAN (Upper level, Mid-level, or lower level).
Found on http://www.jkra.com/karate_glossary.htm

Chudan

Middle body
Found on http://www.kugb.org/kugb-karate-terminology.php
No exact match found