Create a Definition list. This is a very limited, reduced form of the functionality for definition lists of the PHP Markdown Extra module.
A definition list consists of one or more term – definition pairs. The term should be entered at the left of the line, without any spaces in front of it. The definition must then be entered on the next line, preceded by : at the start of the line, followed by 3 spaces, followed by the definition:
cryosphere
: the **frozen** part of earth's surface (ice and snow): Antarctica, Greenland, ice caps, glaciers, permafrost, ice shelfs
climate sensitivity $\lambda$
: how much the temperature changes in reaction to radiative forcing
: or, how much the temperature will have changed when the $\ce{CO2}$
concentration has *doubled* from its pre-industrial value of 280 ppm.
ice shelf
: ice that has slid into the sea from land
When you switch to Reading view or export to PDF, the plugin converts this to a definition list (as in HTML's <dl> element).
The example above then looks like
