ra   (TTS Sound)

The ra has 3 Senses.

• ra, atomic number 88, radium
• ラジウム
• an intensely radioactive metallic element that occurs in minute amounts in uranium ores
• ウラン鉱石中に微量に存在する、放射性の強い金属元素

• ra, re
• レ
• ancient Egyptian sun god with the head of a hawk; a universal creator; he merged with the god Amen as Amen-Ra to become the king of the gods
• タカの頭部を持つ古代エジプトの太陽神

• ra, right ascension, celestial longitude
• 黄経, 赤経
• (astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky; usually expressed in hours and minutes and seconds; used with declination to specify positions on the celestial sphere; "one hour of right ascension equals fifteen degrees"
• 春分点から空の物体を通り抜ける時圏の交点までに東向きに天の赤道に沿って測定された角度を指定する赤道の座標