Exodus 7:11

But Pharoh called the hachems and magicians; and they also, Janis and Jamberes, magicians of Mizraim, did the same by their burnings of divination.

Wisemen of astronomy.

Magicians. Those who change the appearnce of something.

Sorcerers. Those who know the secrets of created matter. The word is quadrilateral (with four root letters, and therefore not Hebrew). Perhaps it is an Egyptian word, or Akkadian (Babylonian/Chaldean), because similar words have been found in scripture only from those languages. The text distinguishes between Moshe's act, in which the staff truly transformed into a snake, and the act of the sorcerers, which is why the text states "belateihem". The word has a trilateral root, it's meaning is as "the flame (blade) of the sword", "I lay burning", "the day that comes shall burn them". It connotes flashing and passing fire, namely illusion.

AND THEY ALSO, THE MAGICIANS OF EGYPT, DID IN LIKE MANNER ‘B’LAHATEIHEM’ (WITH THEIR SECRET ARTS). Our Rabbis have said that these are deeds of sorcerers who perform their arts through angels of destruction, the word b’lahateihem being derived from the expressions: eish loheit (flaming fire); the flame ‘t’laheit’ (burned up) the wicked., 106:18. The purport [of the saying of the Sages] is that these deeds of sorcery are done by means of “the flaming ones,” angels of a fire that burns in man, and he does not know that the fire burns in him and pays no attention to it. It is similar in sense to the expression, “And the Eternal opened the eyes of the young man of Elisha, and behold there were horses of fire and chariots of fire.”. Perhaps these are identical with the angels that dwell in the atmosphere of the spheres of the [four] elements, which are called sarim (lords). (lords), the word should be sheidim (demons). The first reading seems to be more correct here. I will explain this theme again [in the Book of Leviticus 17:7] with the help of the Rock.
But the word b’lateihem, [mentioned further in 8:3 — And the magicians did in like manner ‘b’lateihem’] — is explained [by the Rabbis] as meaning sheidim (demons) — the word being derived from the Hebrew word lat (secret): Speak with David ‘balat’ (secretly) — since the demons come quietly inasmuch as they are ethereal bodies whose presence is not felt. This is why Scripture states [in Verse 11 before us] that Pharaoh called for the wise men and the sorcerers, for the wise men who knew [the art of] incanting and assembling the demons were the leaders and elders of the Egyptians.
The term chartumei mitzrayim (the magicians of Egypt) includes both of them, [i.e., the wise men and the sorcerers]. We do not know the root of the word chartumei. Now Rabbi Abraham ibn Ezra says that it is either an Egyptian or Chaldean word since we find it only mentioned in their accounts. The more likely explanation is that of Rashi, who said that it is an Aramaic compound-word: char tami (those who excite themselves by means of the bones [of the dead]). It is known that the greater part of this craft is one with the bones of dead persons or the bones of animals, just as they mentioned in the case of the yid’oni. takes the bone of a bird [or a beast] called yido’a, puts it into his mouth, burns incense, recites certain prayers, performs a certain ritual until he is in a condition akin to fainting, and falls into a trance in which he predicts the future” (Maimonides,”The Commandments,” Vol. II, p. 10).