That which is not oneself.
(Immunology) Any material that enters the body and is not recognized by the immune system as being part of its body, thereby triggering an immune response; any material appearing to the immune system to be foreign to its body.
New - Add Dictionary Search to Your Site
You can add a free dictionary search box to your own web site by copying and pasting
the following HTML into one of your web pages:
<form action="http://www.freedict.co.uk/search.php" method="post">
<p style="text-align: center; font-family: sans-serif;">
<a style="font-weight: bold;" href="http://www.freedict.co.uk/"
title="FreeDict free online dictionary">FreeDict</a>
<input type="text" name="word" size="20" value="" />
<input type="submit" name="submit" value="Search Dictionary" />
Tue 18th December 2018