ca·lyp·tra

(kə-lĭp′trə)

1. The protective cap or hood covering the spore case of a moss or related plant.

2. A similar hoodlike or caplike structure, such as a root cap.

[Medieval Latin, from Greek kaluptra, veil, from kaluptein, to cover; see kel- in Indo-European roots.]

ca·lyp′trate′ (-trāt′) adj.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

calyptra

(kəˈlɪptrə)

1. (Botany) a membranous hood covering the spore-bearing capsule of mosses and liverworts

2. (Botany) any hoodlike structure, such as a root cap

[C18: from New Latin, from Greek kaluptra hood, from kaluptein to cover]

calyptrate adj

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ca•lyp•tra

(kəˈlɪp trə)

n., pl. -tras.

1. a hood or hoodlike part, as the lid of the capsule in mosses.

2. a root cap.

[1745–55; < New Latin < Greek kalýptra veil, covering]

ca•lyp′trate (-treɪt) adj.

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun

calyptra - the hood or cap covering the calyx of certain plants: e.g., the California poppy

plant part, plant structure - any part of a plant or fungus

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References in periodicals archive

62 Calyptra derived from the last one or two bracteate organs below the flower (0) absent, (1) present.

Phylogenetic Analyses of Cretaceous Fossils Related to Chloranthaceae and their Evolutionary Implications

Skin-piercing blood-sucking moths III: Feeding act and piercing mechanism of Calyptra eustrigata (Hmps.) (Lepidoptera: Noctuidae).

Primer registro de polillas perforadoras de frutos (Lepidoptera: Erebidae) de Colombia

The fact that the stigmata were receptive and the opening of anthers occurred before the calyptra fall shows cleistogamy, a form of self-pollination reported in other species (MULLINS et al., 1992).

HONEY BEE CONTRIBUTION TO 'BORDO' GRAPEVINE FRUIT PRODUCTION IN SOUTHERN BRAZIL/CONTRIBUICAO DA ABELHA MELIFERA PARA A PRODUCAO DE FRUTOS DA VIDEIRA 'BORDO' NO SUL DO BRASIL

Weber (1813) gave account of the mitriform calyptra of Cryphaea as a defining feature.

CLADISTIC ANALYSIS OF THE FAMILY CRYPHAEACEAE (BRYOPHYTA) WITH EMPHASIS ON CRYPHAEA: A STUDY BASED ON A COMPREHENSIVE MORPHOLOGICAL DATASET

calyptra In mosses, a thin membrane protecting the developing sporophyte and forming a hood over the sporangium (structure containing spores).

Sex expression and reproduction of four bryophytes following timber harvesting

A typical tissue organization was observed in the root apex of both adventitious and embryonic roots with a meristematic zone covered by a well-developed calyptra, followed in basipetal direction by elongation zone in which stele, cortex, and epidermis were clearly distinguishable (Figures 4(a) and 4(b)).

In vitro culture conditions and OeARF and OeH3 expressions modulate adventitious root formation from oleaster (Olea europaea L. subsp. europaea var. sylvestris) cuttings

Schismatoglottis calyptra 20) Pteridium aquilinum 20.

Taxonomy of ethnomedicinal botanicals and documentation of ethnomedicinal practices traditionally used by three selected ethnolinguistic communities in Mindanao, Philippines

This is often around 50-60 days after flowering (when at least 75% of the florets in the cluster have shed the little caps known as "calyptra"), depending on variety and location.

Crop estimation revisited