excerpt (fragment, snippet) (tag)

get_extended()

Divides content into 2 parts: before <!--more--> and after it. Returns an array with the resulting parts.

get_the_excerpt()

Retrieves the excerpt of current or defined post. By default, should be used in WordPress Loop.

has_excerpt()

Whether the post has a custom excerpt.

the_excerpt()

Displays the excerpt (quote) of the post, with [...] at the end (but this is not a link to reading the full material).

wp_trim_excerpt()

Generates an excerpt from the content, if needed.