From Wikipedia : "Egusi (also known by variations including agusiagushi) is the name for the fat- and protein-rich seeds of certain cucurbitaceous plants (squashmelongourd), which after being dried and ground are used as a major ingredient in West African cuisine. Authorities disagree whether the word is used more properly for the seeds of the colocynth, those of a particular large-seeded variety of the watermelon, or generically for those of any cucurbitaceous plant.  The characteristics and uses of all these seeds are broadly similar."