Don't put a term to something which is not known it will leave us at the mercy of someone elses agenda - might i add someone who has nothing to do with your situation.
When i was 3 years old i was grabbed by one of these things and pulled into a wall (quite hard) and ill never forget how it was translucent... i always told people this story and used the exact same description "translucent".
The only logical thing i can think of before Aliens or Angels is a cloaking device which do exist. Try not to live in fear around situations like this because if anything they are showing you the world is much larger and stranger then any novel.
Take pride in seeing the mysteries of life, i have and it has opened me up to never being afraid of the dark of the mystery.
Wisdom says be strong