(adj): linear with respect to each of two variables or positions
(adj): vs. subtractive) -- (characterized or produced by addition
(adj): increasing by successive addition
(adj): capable of being added or added to
(adj): further or added
(adj): acting as or providing a complement (something that completes the whole)
(adj): increasing gradually by regular degrees or additions
(adj): having a day or month inserted to make the calendar year correspond to the solar year: "Feb. 29 is an intercalary day"
(adj): of or relating to a summation or produced by summation
(adj): added to complete or make up a deficiency
(n): something added to enhance food or gasoline or paint or medicine
(n): a component that is added to something to improve it
