English
stratal
From stratum + -al.
Formed from stratum + -al
Proto-Indo-European *sterh₃- ‘to spread’
Proto-Indo-European *str̥néh₃ti ‘to strew’
Proto-Italic *stornō
Latin sternō ‘spread’
Latin strātum ‘a spread for a bed, coverlet, quilt, blanket’
English stratum
Today it means
adj of or pertaining to a stratum
Language periods are conventional ranges, not dates for this word.
Etymograph / stratal