nucule
/ˈnjuːkjuːl/Botany
noun
1Originally: †each of the seeds in a nuculanium (obsolete ). Later: a small nut or nutlet; a section of a compound (usually hard) fruit; a nut borne in an involucre. Now rare.
2The female reproductive structure (oogonium) of a charophyte.
Origin
Early 19th century; earliest use found in John Lindley (1799–1865), botanist and horticulturist. From French nucule from classical Latin nucula a small or young nut from nuc-, nux nut + -ula.