Adj. the rusty colour of english breakfast tea steeped long and hard with a small splash of milk, which is remniscent of terracotta pottery.
N. the perfect cup of tea often associated with extraordinarily long brewing time, or the infamous 'double-bagger'
'An english breakfast please, and make sure it's tea-acotta!'; 'Eddy gave me a double-bagger, and it turned out to be the most delicious tea-acotta yet.'