From raqa'; properly, an expanse, i.e. The firmament or (apparently) visible arch of the sky -- firmament.
see HEBREW raqa'
H7549. raqia
רָקִיעַ noun masculineGenesis 1:6 extended surface, (solid) expanse (as if beaten out; compare Job 37:18); — absolute ׳ר Ezekiel 1:22 +, construct ׳רְ Genesis 1:14 +; — ᵐ5 στερέωμα, ᵑ9 firmamentum, compare Syriac below √above; —
1 (flat) expanse (as if of ice, compare הַקֶּרַח כְּעֵין), as base, support (WklAltor. Forsch. iv. 347) Ezekiel 1:22-23, 25(gloss ? compare Co Toy), 1:26 (supporting ׳י's throne). Hence (Co1:22)
2 the vault of heaven, or 'firmament,' regarded by Hebrews as solid, and supporting 'waters' above it, Genesis 1:6-7, (3 t. in verse); 1:8 (called שָׁמַיַם; all P), Psalm 19:2 ("" הַשָּׁמַיַם), הָר ׳זֹהַר Daniel 12:3; also הַשָּׁמִיִם ׳ר Genesis 1:14-15, 17, ר ׳עַלמְּֿנֵי ׳הַשּׁ 1:20 (all P). **עֻזּוֺ רְקִיעַ Psalm 150:1 (suffix reference to ׳י).