From the same as kiyd (compare kadkod); properly, something struck off, i.e. A spark (as struck) -- spark.
see HEBREW kiyd
see HEBREW kadkod
H3590. kidod
[כִּידוֺד] noun masculine spark (from above √, = strike out a spark, according to Thes Rob-Ges, compare Sta§ 216 (doubtfully), LagBN 182 Köii. 147, § 71. 1, Late Hebrew כִּדּוֺד = rod (of iron, etc.); אֵשׁ שֶׁל כִּדּוֺדִיּוֺתְ i.e. red-hot rods; but BaNB § 142, 139 derives this and כַּדְכִּד from √ כיד = Arabic , emit fire (said of a fire-stick, , Lane2639b, compare 1257 b), and so Buhl) — only plural construct אֵשׁ כִּידוֺדֵי Job 41:11 of breath of crocodile ("" לַמִּידִים).