aculeus

English Thesaurus

1. a sharp-pointed process especially a sting of a hymenopterous insect (noun.animal)

hypernym	:	stinger,
definition	:	a sharp organ of offense or defense (as of a wasp or stingray or scorpion) often connected with a poison gland (noun.animal)

2. a stiff sharp-pointed plant process (noun.plant)

hypernym	:	enation, plant process,
definition	:	a natural projection or outgrowth from a plant body or organ (noun.plant)

hyponym	:	pricker, prickle, spikelet, spine, sticker, thorn,
definition	:	a small sharp-pointed tip resembling a spike on a stem or leaf (noun.plant)