Strong's Concordance

Original word: ὄρθρος
Transliteration: orthros
Definition (short): daybreak
Definition (full): daybreak, dawn

NAS Exhaustive Concordance

Word Origin: a prim. word
Definition: daybreak, dawn
NASB Translation: daybreak (1), early in the morning (1), early dawn (1).
NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries.
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Strong's Exhaustive Concordance

From the same as oros; dawn (as sun-rise, rising of light); by extension, morn -- early in the morning.

see GREEK oros

KJV: Now upon the first day of the week, very early in the morning, they came unto the sepulchre, bringing the spices which they had prepared, and certain others with them.
NASB: But on the first day of the week, at early dawn, they came to the tomb bringing the spices which they had prepared.
KJV: And early in the morning he came again into the temple, and all the people came unto him; and he sat down, and taught them.
NASB: Early in the morning He came again into the temple, and all the people were coming to Him; and He sat down and began to teach them.
KJV: And when they heard that, they entered into the temple early in the morning, and taught. But the high priest came, and they that were with him, and called the council together, and all the senate of the children of Israel, and sent to the prison to have them brought.
NASB: Upon hearing this, they entered into the temple about daybreak and began to teach. Now when the high priest and his associates came, they called the Council together, even all the Senate of the sons of Israel, and sent orders to the prison house for them to be brought.