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

(cytology, immunology) a macrophage

swallow, gulp down / (figuratively) digest, understand

foreign body

the inside of the body; the body

jump to conclusion, get ahead of oneself

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

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

counter for number of kinds or types

an origin, cause / a type, class / an interest, appeal