A Content Item is a discrete piece of content within the Joomla hierarchy. A Content item can be an article, a content category, a menu item or a link. Usually Content Items are placed in the main body of your page. Content Item are the last in the Section/Category hierarchy or it can be a separate Static Content Item.
If this is referring to what I think it is, you might consider mentioning that Content Items can be in the form of a Content Item (inside the Section/Category hierarchy) or a Static Content Item.
a news or story you write and that is displayed in the main area of you site
An individual article which forms the lowest layer of the three tier hierarchy used by Joomla to organise your website. Content items can be split into two parts: the 'Intro Text', and the 'Main Text'. This is useful for displaying your content in a 'blog' (short for 'weblog') style - where you display a list of content items, showing only the intro text, and the visitor has to click on an item to view the full article (intro and main). When not using a blog, you only need to enter your content in the 'intro text' part.
A content item is a discrete piece of content within the Joomla! hierarchy. A content item may be associated with a particular Section/Category combination or a Static Content Item. Usually content items are displayed in the main body of your page. Content item is the last in the Section/Category/Content Items hierarchy or it can be a separate Static Content Item.
Information stored in a database and used to communicate skills or knowledge. It can be in any media format, including text, graphics, animation, video, audio, and HTML plug-in. It is combined with practice items and assessment items to create a RIO.