Orthopedic Questions. I'm A Young Active 70 Yr. Old! I

Orthopedic questions. I'm a young active 70 yr. Old! I swim 40 laps 4 X a week and bike 10-20 Miles on the weekend to keep my pain in check & feeling somewhat limber & in good health. I'm also an active Alzheimer's respite caregiver every week. Plus much more...
I recently had back X-rays due to severe back pain I've experienced since puberty which is worsening with age. Many terms have not been explained...such as: multiple pelvic phleboliths, joint spurring, grade 1 spondylolithesis @ L4-5 & dextroconvex curvature at the thoracolumbar junction... I also have slight scoliosis. Please explain terms. Thank you .