No, a disclaimer is not the same as terms and conditions. A disclaimer addresses specific liability issues, whereas terms and conditions outline the rules for site use and establish property rights.
For example, a medical disclaimer asserts that your website is not at fault if a user suffers damages after acting on medical advice found on your site. Terms and conditions, on the other hand, may establish that all content and images on your site are your intellectual property and not available for duplication.
These are only two examples of how terms and conditions and disclaimers work. Both policies can help limit your legal liability and protect your rights.