pseudomorph
noun
pseu·do·morph ˈsü-də-ˌmȯrf 
1
: a mineral having the characteristic outward form of another species
2
: a deceptive or irregular form
pseudomorphic
ˌsü-də-ˈmȯr-fik
adjective pseudomorphism
ˌsü-də-ˈmȯr-ˌfi-zəm
noun pseudomorphous
ˌsü-də-ˈmȯr-fəs
adjective 
Word History
Etymology
probably from French pseudomorphe, from pseud- + -morphe -morph
First Known Use
1839, in the meaning defined at sense 1
- on the hustings
- on the increase
- on the inside
- on the job
- on the knife-edge
- on the lam
- on the latch
- on the level
- on the line
- on the lips of
- on the lookout for
- on the loose
- on the make
- on the map
- on the march
- on the market
- on the mend
- on the minus side
- on the money
- on the morrow
- on the move
- on the nod
- on the nose
- on the off chance
- on the offensive