doubled
valvate with the margins curved outwardly
folded, with the abaxial surfaces facing one another
To double again: to multiply: to repeat.
To repeat (a word or part of a word) in order to form a new word or phrase, possibly with modification of one of the repetitions.
triple
three times as great
To make threefold; to triple.
by a factor of three
An algebraic variety of dimension 3.