a seed / a pit or stone in a fruit / a gamete (reproductive cell such as a spermatozoan or egg) / a lineage, bloodline / an origin, cause / the materials or ingredients from which something is made

bromofluoromethane

(neuroscience) chemotransmitter

material, substance

chemistry (branch of natural science)

chemistry (branch of natural science)

seed / plant, sow / class, kind, variety / (taxonomy) species

an origin, cause / a type, class

counter for number of kinds or types

a seed / a kind, type, sort, class, or category / (taxonomy) a species