What
is a Yantra?
Definition: A meditational device used in Hindu meditation.
From the root "yam," meaning "to sustain,"
the Yantra is used to maintain a focused state during meditation.
It is usually composed of an outer geometrical form enclosing
an interior geometrical designs. Each particular design is
used for a specific purpose or intent.
Some of the basic elements of a Yantra are:
The Bindu, or infinite point:

Upward and downward facing triangles, symbolizing a female,
watery energy, and male, fiery cosmic energy. This hexagram
or six pointed star symbolizes the union of Shiva and Shakti,
masculine and feminine energy.
The lotus, a symbol of purity:

The most recognizable yantra is the Sri (abundant) Yantra:

|