Pear blight

Pear blight
Pear Pear (p[^a]r), n. [OE. pere, AS. peru, L. pirum: cf. F. poire. Cf. {Perry}.] (Bot.) The fleshy pome, or fruit, of a rosaceous tree ({Pyrus communis}), cultivated in many varieties in temperate climates; also, the tree which bears this fruit. See {Pear family}, below. [1913 Webster]

{Pear blight}. (a) (Bot.) A name of two distinct diseases of pear trees, both causing a destruction of the branches, viz., that caused by a minute insect ({Xyleborus pyri}), and that caused by the freezing of the sap in winter. --A. J. Downing. (b) (Zo["o]l.) A very small beetle ({Xyleborus pyri}) whose larv[ae] bore in the twigs of pear trees and cause them to wither.

{Pear family} (Bot.), a suborder of rosaceous plants ({Pome[ae]}), characterized by the calyx tube becoming fleshy in fruit, and, combined with the ovaries, forming a pome. It includes the apple, pear, quince, service berry, and hawthorn.

{Pear gauge} (Physics), a kind of gauge for measuring the exhaustion of an air-pump receiver; -- so called because consisting in part of a pear-shaped glass vessel.

{Pear shell} (Zo["o]l.), any marine gastropod shell of the genus {Pyrula}, native of tropical seas; -- so called from the shape.

{Pear slug} (Zo["o]l.), the larva of a sawfly which is very injurious to the foliage of the pear tree. [1913 Webster] [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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Look at other dictionaries:

  • pear blight — noun a disease blackening the leaves of pear and apple trees • Syn: ↑fire blight • Hypernyms: ↑leaf blight • Hyponyms: ↑blight canker * * * noun 1 …   Useful english dictionary

  • pear blight beetle — noun see pear blight 2a …   Useful english dictionary

  • Pear — (p[^a]r), n. [OE. pere, AS. peru, L. pirum: cf. F. poire. Cf. {Perry}.] (Bot.) The fleshy pome, or fruit, of a rosaceous tree ({Pyrus communis}), cultivated in many varieties in temperate climates; also, the tree which bears this fruit. See {Pear …   The Collaborative International Dictionary of English

  • Pear family — Pear Pear (p[^a]r), n. [OE. pere, AS. peru, L. pirum: cf. F. poire. Cf. {Perry}.] (Bot.) The fleshy pome, or fruit, of a rosaceous tree ({Pyrus communis}), cultivated in many varieties in temperate climates; also, the tree which bears this fruit …   The Collaborative International Dictionary of English

  • Pear gauge — Pear Pear (p[^a]r), n. [OE. pere, AS. peru, L. pirum: cf. F. poire. Cf. {Perry}.] (Bot.) The fleshy pome, or fruit, of a rosaceous tree ({Pyrus communis}), cultivated in many varieties in temperate climates; also, the tree which bears this fruit …   The Collaborative International Dictionary of English

  • Pear shell — Pear Pear (p[^a]r), n. [OE. pere, AS. peru, L. pirum: cf. F. poire. Cf. {Perry}.] (Bot.) The fleshy pome, or fruit, of a rosaceous tree ({Pyrus communis}), cultivated in many varieties in temperate climates; also, the tree which bears this fruit …   The Collaborative International Dictionary of English

  • Pear slug — Pear Pear (p[^a]r), n. [OE. pere, AS. peru, L. pirum: cf. F. poire. Cf. {Perry}.] (Bot.) The fleshy pome, or fruit, of a rosaceous tree ({Pyrus communis}), cultivated in many varieties in temperate climates; also, the tree which bears this fruit …   The Collaborative International Dictionary of English

  • blight canker — noun a phase of fire blight in which cankers appear • Hypernyms: ↑fire blight, ↑pear blight * * * noun : a phase of fire blight characterized by cankers …   Useful english dictionary

  • Blight — refers to a specific symptom affecting plants in response to infection by a pathogenic organism. It is simply a rapid and complete chlorosis, browning, then death of plant tissues such as leaves, branches, twigs, or floral organs. [Agrios, George …   Wikipedia

  • Pear — Pyrus redirects here. For other uses, see Pyrus (disambiguation). For other uses, see Pear (disambiguation). Pears European Pear branch with fruit Scientific classification …   Wikipedia

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