capable of or tending to make an addition; additional; supplementary
Word origin
[1650–60; addit(ion) + -ory1]This word is first recorded in the period 1650–60. Other words that entered Englishat around the same time include: backhand, cardholder, oscillation, parameter, pony-ory an adjective-forming suffix, joined to bases of Latin origin in imitation of borrowedLatin words containing the suffix -tory (and its alternant -sory). Other words that use the affix -ory include: excretory, sensory, statutory