lower boundary
lower boundary · lower boundaries
The most ancient time encompassed by a given geological periodThe most ancient time encompassed by a given geological period.
Meaning
2 sensesThe most ancient time encompassed by a given geological period.
The most recent time encompassed by a given period of time.
Forms
plural: lower boundaries| Singular | lower boundary |
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| Plural | lower boundaries |
regular
Word family
1 related wordsRelatedupper boundary