Around about 1984
1930's to the 1950's
the "tri-flicer" if that is what you mean is a plane made in 1995.
1925.
Turkey
Three times each year.
1981.
1985
It is not known how often a tornado like the Tri-state tornado might occur. Some scientists estimate that it may have been at least a 1000 year storm.
Croeso i flwyddyn tri a phedwar
There are three trimesters in 1 year, hence the prefix tri- which means three.
adenosine tri phosphate
so far theres no volurteerting for 11 year olds. :[