Lexical Definition

‎אוּד‎ ʼûwd (ood) firebrand H:N-M
from an unused root meaning to rake together

(fire-) brand.

1) brand, fire brand

Usage: 3 forms in 3 verses
Form Translated As     In Verse(s)
כְּא֖וּד like a piece of firewood Amos.4.11
הָאוּדִ֛ים pieces of firewood Isa.7.4
א֖וּד a piece of firewood Zech.3.2

Brown-Driver-Briggs

‎אוּד‎ noun masculine brand, fire-brand (originally perhaps bent stick used to stir fire) ‎מֻצָּל מִשְּׂרֵפָה‎ ‎׳‎‎א‎ Amos 4:11 = ‎מֵאֵשׁ‎ ‎׳‎‎מ‎ ‎׳‎‎א‎ Zech 3:2, plural ‎זַנְבוֺת הָאוּדִים הָעֲשֵׁנִים‎ Isa 7:4, stumps of smoking firebrands.

Brown-Driver-Briggs References

Book Refs
Isaiah 7:4
Amos 4:11
Zechariah 3:2