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Old Testament Hebrew Lexical Dictionary
Strong's #07549 - רָקִיעַ
1) extended surface (solid), expanse, firmament
1a) expanse (flat as base, support)
1b) firmament (of vault of heaven supporting waters above)
1b1) considered by Hebrews as solid and supporting ‘waters’ above
Jeff Benner, Ancient Hebrew Research Center Used by permission of the author.
רָקִיעַ m. Genesis 1:6,, Psalms 19:2 fully רְקִיעַ הַשָּׁמַיִם Genesis 1:14, 15, 17, 20, etc. the firmament of heaven, spread out like a hemisphere above the earth (from the root רָקַע), like a splendid and pellucid sapphire (Exodus 24:10, compare Daniel 12:3), to which the stars were supposed to be fixed, and over which the Hebrews believed there was a heavenly ocean (Genesis 1:7, 7:11 Psalms 104:3, 148:4 compare, however, Genesis 2:6). LXX. στερέωμα. Vulg. firmamentum. Luth. Befte.
the Fourth Week after Epiphany