This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. That may be ascribed a date (or age)

adj. That may be dated; having a known or ascertainable date.

Capable of being dated. Also spelled dateable.

adj. that can be given a date

"Even the date of the eruption, conventionally given as August 79 AD, can be challenged for, as Beard points out, a coin datable to the following September was found in the rubble caused by the eruption."

dateable   

plant-like    certainpeople    ammonite    million-year-old    far-sought    half-decayed    tradeshow    youl    youwill    Miocene