PYRETHRUM

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 Dictionary entry overview: What does Pyrethrum mean? 

• PYRETHRUM (noun)
  The noun PYRETHRUM has 4 senses:

1. made of dried flower heads of pyrethrum plants

2. white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum

3. spring-flowering garden perennial of Asiatic origin having finely divided aromatic leaves and white to pink-purple flowers; source of an insecticide; sometimes placed in genus Chrysanthemum

4. used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum

  Familiarity information: PYRETHRUM used as a noun is uncommon.

 Dictionary entry details 

• PYRETHRUM (noun)

Sense 1

Meaning:

Made of dried flower heads of pyrethrum plants

Classified under:

Nouns denoting plants

Hypernyms ("pyrethrum" is a kind of...):

insect powder; insecticide (a chemical used to kill insects)

Sense 2

Meaning:

White-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum

Classified under:

Nouns denoting plants

Synonyms:

Chrysanthemum cinerariifolium; Dalmatia pyrethrum; Dalmatian pyrethrum; pyrethrum; Tanacetum cinerariifolium

Hypernyms ("pyrethrum" is a kind of...):

herb; herbaceous plant (a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests)

Holonyms ("pyrethrum" is a member of...):

genus Tanacetum; Tanacetum (a large genus of plants resembling chrysanthemums; comprises some plants often included in other genera especially genus Chrysanthemum)

Sense 3

Meaning:

Spring-flowering garden perennial of Asiatic origin having finely divided aromatic leaves and white to pink-purple flowers; source of an insecticide; sometimes placed in genus Chrysanthemum

Classified under:

Nouns denoting plants

Synonyms:

Chrysanthemum coccineum; painted daisy; pyrethrum; Tanacetum coccineum

Hypernyms ("pyrethrum" is a kind of...):

flower (a plant cultivated for its blooms or blossoms)

Holonyms ("pyrethrum" is a member of...):

genus Tanacetum; Tanacetum (a large genus of plants resembling chrysanthemums; comprises some plants often included in other genera especially genus Chrysanthemum)

Sense 4

Meaning:

Used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum

Classified under:

Nouns denoting plants

Synonyms:

genus Pyrethrum; Pyrethrum

Hypernyms ("Pyrethrum" is a kind of...):

asterid dicot genus (genus of more or less advanced dicotyledonous herbs and some trees and shrubs)

Holonyms ("Pyrethrum" is a member of...):

aster family; Asteraceae; Compositae; family Asteraceae; family Compositae (plants with heads composed of many florets: aster; daisy; dandelion; goldenrod; marigold; lettuces; ragweed; sunflower; thistle; zinnia)