The English word "seed" occurs in the Holy Bible 254 times. It's translated from the Hebrew word "zehrah" [Strong's #2233] 202 times and from the Greek words "sperma" [Strong's #4690] and "spora" [Strong's 4701] a total of 52 times.
We know from His discussion with the jews that Jesus made a distinction between the "seed" [read: sperma] of Abraham and the "children" [read: teknon] of Abraham. He acknowledged that they were of the "seed" of abraham as they claimed, but He denied they were the "teknon" [read: children, or descendants] of Abraham:
Clearly, when jews ARE the "seed" but are NOT the "descendants", there's a major difference in the above between "sperma" and "teknon", or "seed" and "children", or "seed" and "descendants", which gives us an opportunity to more clearly understand the differences between these two seemingly similar Greek (and English) words. The clue to the difference is in Strong's definition of "sperma" as being "remnant", which Webster's defines as:
"Remnant of my thoughts" is the sense that Jesus meant to apply to the jews' claim that they had a genealogical relationship with Abraham. Jesus said their relationship to Abraham was as "remnants" and not as "descendants".
What we know about the Edomites who lived in Judaea at the time Jesus was there is that they were direct descendants of Esau who had miscegentated with "Canaanite women" and had been exiled from and continually warred with other descendants of Abraham [read: Israelites] for the past 40 generations. Esau was a grandson of Abraham, but none of Esau's descendants intermarried with, socialized with, nor had any other contact with (other than wars) with Israelites.
What are "Canaanite women", why did everyone from Abraham to Esau's parents to Jesus have heartburn over the fact that Esau married them, and why did God "hate" Esau for it?
The Canaanite women were descendants of Cain--marrying them polluted the pure Hebrew and Semitic Races.
And Isaac called Jacob, and blessed him, and charged him, and said unto him, Thou shalt not take a wife of the daughters of Canaan,Genesis 28:1
To be a "seed" of someone requires only a genealogical relationship with them. For an Israelite to be "children" or "descendants" not only requires this genealogical relationship, but that God's Law and Israelite Law regarding miscegenation not be violated.
Had Esau not married Canaanite women, it's possible that we wouldn't be having the problems in the world with jews that are about to take us under.
From H2232; seed; figuratively fruit, plant, sowing time, posterity: - X carnally, child, fruitful, seed (-time), sowing-time.
From G4687; somethng sown, that is, seed (including the male "sperm"); by implication offspring; specifically a remnant (figuratively as if kept over for planting): - issue, seed.
From G4687; a sowing, that is, (by implication) parentage: - seed.
From the base of G5098; a child (as produced): - child, daughter, son.