Množina: pyres

ETYM Latin pure, Greek, from pyros fire. Related to Fire.
Wood heaped for burning a dead body as a funeral rite; SYN. funeral pyre.
A combustible heap for burning a dead body as a funeral rite; broadly; a pile of material to be burned.

Množina: pyrenes

Fruit-stone.

Of or pertaining to the Pyrenees, a range of mountains separating France and Spain.

Množina: Pyrenees

A chain of mountains between France and Spain.
(French Pyrénées; Spanish Pirineos) Mountain range in SW Europe between France and Spain; length about 435 km/270 mi; highest peak Aneto (French Néthon) 3,404 m/11,172 ft. Andorra is entirely within the range. Hydroelectric power has encouraged industrial development in the foothills.

Množina: Pyrenees daisies

Perennial of Portugal similar to the oxeye daisy; Also called: Leucanthemum lacustre, Chrysanthemum lacustre.

Množina: pyrenocarps

Drupe.

Množina: pyrenoids

One of the protein bodies in the chloroplasts of various lower organisms (as some algae) that are involved in starch synthesis and deposition

Množina: pyrenolyses

Množina: Pyrenomycetes

Class of fungi in which the fruiting body is a perithecium; includes powdery mildews and ergot and neurospora; Also called: class Pyrenomycetes.

Množina: pyrethrins

Chemical compound used as an insecticide
Either of two oily liquid esters C21H28O3 and C22H28O5 having insecticidal properties and occurring especially in the flowers of pyrethrum

Množina: pyrethroids

Any of various synthetic compounds that are related to the pyrethrins and resemble them in insecticidal properties

Množina: pyrethrums

Term used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum; Also called: genus Pyrethrum.
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.
Popular name for some flowers of the genus Chrysanthemum, family Compositae. The ornamental species C. coccineum, and hybrids derived from it, are commonly grown in gardens. Pyrethrum powder, made from the dried flower heads of some species, is a powerful contact pesticide for aphids and mosquitoes.
Chrysanthemumlike garden plant; kind of insect powder.

ETYM Greek, burning heat, fever, from pyros fire: cf. French pyrétique.
Causing fever.
Pertaining to fever.
Of, pertaining to or for the cure of fevers.