spo·ro·pol·len·in 
(spôr′ə-pŏlə-nĭn)
(spôr′ə-pŏlə-nĭn)n.
A decay-resistant complex biopolymer that constitutes the outer wall of spores and pollen grains.
- non prosequitur
- nonreader
- nonrecombinant
- nonrecoverable
- non-REM sleep
- nonrenewable
- nonrepresentational
- nonresidence
- nonresidency
- nonresident
- nonresistance
- nonresistant
- nonrestrictive
- nonreturnable
- nonrigid
- nonscheduled
- nonsectarian
- nonsectarianism
- nonsedating
- nonself
- nonsense
- nonsense verse
- nonsensical
- nonsensicality
- nonsensically