Meaning of pre-aestival in English:
pre-aestival
adjective
(US pre-estival)
Occurring or undergoing some process (e.g. flowering) before midsummer.
Pronunciation
pre-aestival
/(ˌ)priːˈiːstɪvl/ /ˌpriːiːsˈtʌɪvl/ /ˌpriːɛsˈtʌɪvl/ Origin
Late 19th century; earliest use found in The Century Dictionary.