Photostat
Xerox
clone
copy
counterpart
cube
ditto
double
dupe
duplicate
duplication
facsimile
hectograph
manifold
microcopy
microfilm
mimeo
mimeograph
model
multigraph
multiply by three
quadruplicate
reduplicate
repetition
replica
replicate
replication
representation
reproduce
reproduction
second carbon
stat
tern
ternal
ternary
ternate
three-ply
threefold
trace
transcribe
treble
trilogic
trinal
trine
triple
tripled
triplex
triplication
triplicated
triplicates
triplicating
140alexis_de_tocqueville
`amateurs'
a
and
anomeric
artesian
dark-rimmed
diamond-like
half
less-substituted
low-capacity
microtiter
one
onionskin
petrifying
rear-view
revenue
times
two
use-plan