According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 10 words with the pattern ----IMA--. That is, nine letter words with 5th letter I and 6th letter M and 7th letter A. In alphabetical order, they are:

acclimate

archimage

collimate

exanimate

inanimate

lacrimals

proximate

reanimate

reprimand

sublimate

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern --LL-MA--. That is, nine letter words with 3rd letter L and 4th letter L and 6th letter M and 7th letter A. In alphabetical order, they are:

collimate

mollymawk

1. Use a lead apron on the patient.

2. Use high speed film (or digital).

3. Use filtration of the useful beam to recommended levels.

4. Use a long cone to collimate the useful beam.

Source: Wilkins, Ester M. Clinical Practice of the Dental Hygienist. 5th ed. pp.140-41.

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern -O---MA-E. That is, nine letter words with 2nd letter O and 6th letter M and 7th letter A and 9th letter E. In alphabetical order, they are:

coelomate

collimate

housemate

Autocollimation is a setup where a beam of parallel light rays is made to leave an optical system (the system to be collimated) and is reflected back into the same system by a plane mirror (the beam should therefore end up where it stated from). One can then manually or use some mechanism ("auto"matically) to adjust the optics of the instrument being collimated so that the geometry of the instrument makes the beam reflect back to its start point.