H2755 חֲרֵי־יוֹנִים

excrements of doves {or a vegetable}

doves' dung.

from the plural of H2716 (חֶרֶא) and the plural of H3123 (יוֹנָה); or perhaps rather the plural of a single word חֲרָאיוֹן, probably a kind of vegetable