selector

In CSS, the XHTML tag that the formatting is applied to.

XHTML:
<selector>blah.</selector>

CSS:
selector {property: value}

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tag

A sequence of characters used in XHTML and CSS to provide information to the browser, such as text formatting.

<b></b> are, respectively, the opening and closing bold tags. This tells the browser to make the enclosed text heavier than normal.

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value

in CSS, the value is the amount or setting of a property.

selector {text-weight: bold;} - this applies the value 'bold' to the property 'text-weight'.

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specificity

A CSS rule that states that in case of conflict, the properties of the most specific selector is applied.

For example: if we make all tables bold, but make all table cells have a normal weight, the latter rule will be applied. This is because "table cell" is more specific than "table".

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xin loy

Slang used by American soldiers in the Vietnam War, sardonically meaning "sorry about that", "too damn bad", or "tough shit". Derived from Vietnamese, in which it means a polite "excuse me".

Aw, did I hurt your feelings? Xin loy!

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client

A computer system or process requesting something from another system or process in a client-server relationship. The opposite of 'server'.

Browsers are clients because they request information from websites' servers.

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clientside

Anything that occurs on the client in a client-server relationship. For example, CSS is clientside because it's used by the browser. PHP is serverside (the opposite of clientside) because it's used by the server.

XHTML and CSS are clientside languages.