coriander

Boyd’s Bible Dictionary:

(smelling like a bed-bug). A plant of the parsley fancily producing aromatic seeds (Ex. 16:31; Num. 11:7).

Concise Bible Dictionary:

A round aromatic seed, the Coriandrum sativum, to which the manna was compared, both as to form and color (Ex. 16:31; Num. 11:7).
Coriandrum sativum
Coriandrum sativum

Strong’s Dictionary of Hebrew Words:

Transliteration:
gad
Phonic:
gad
Meaning:
from 1413 (in the sense of cutting); coriander seed (from its furrows)
KJV Usage:
coriander