grandparental


grand·par·ent

G0226900 (grănd′pâr′ənt, -păr′-, grăn′-)n. A parent of one's mother or father; a grandmother or grandfather.
grand′pa·ren′tal (-pə-rĕn′tl) adj.grand′par′ent·hood′ n.

grandparental

(ˈɡrændpəˌrɛntəl; ˈɡrænpəˌrɛntəl) adjrelating to or belonging to a grandparent or grandparents