Definitions containing the term t square

What does t square mean?

SQF	SQuare Foot Miscellaneous » Unit Measures
SQ	SQuare Computing » Networking
SQM	SQuare Meter Miscellaneous » Unit Measures
M(2)	Square Meter Miscellaneous » Unit Measures
RMS	Root Mean Square Academic & Science » Mathematics
RMS	Root Mean Square Academic & Science » Ocean Science
RMS	Root Mean Square Academic & Science » Physics
PSI	Pounds per Square Inch Academic & Science » Physics
PSI	Pounds per Square Inch Academic & Science » Ocean Science
PSI	Pounds per Square Inch Governmental » Military
PSI	Pounds per Square Inch Miscellaneous » Unit Measures
PSI	Pounds per Square Inch Governmental » Transportation
PSI	Pounds per Square Inch Academic & Science » Electronics
[:-]	Square head Internet » Emoticons
SQR	Square Miscellaneous » Unit Measures
SQU	SQUare Miscellaneous » Unit Measures
PSIG	Pounds Per Square Inch, Gauge Miscellaneous » Unit Measures
PSIG	Pounds per Square Inch, Gauge Academic & Science » Physics
PSIA	Pounds Per Square Inch, Absolute Miscellaneous » Unit Measures
GSF	Gross Square Feet Miscellaneous » Unit Measures
PSI	Pounds per Square Inch Academic & Science » Chemistry
Vrms	Root-Mean-Square Voltage Academic & Science » Electronics
RMSEP	Root Mean Square Error of Prediction Academic & Science » Chemistry
RMSEP	Root Mean Square Error of Prediction Academic & Science » Mathematics
SKA	Square Kilometre Array Academic & Science » Astronomy

T square(n.): aT-shaped ruler having a short crosspiece that slides along the edge of a drawing board as a guide to the perpendicular longer section in making parallel lines, right angles, etc.