achene

American  

[ey-keen, uh-keen] / eɪˈkin, əˈkin /

Or akene

noun

Botany.

1. any small, dry, hard, one-seeded, indehiscent fruit.

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achene British  

/ əˈkiːn /

noun

1. a dry one-seeded indehiscent fruit with the seed distinct from the fruit wall. It may be smooth, as in the buttercup, or feathery, as in clematis

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achene Scientific  

/ ā-kēn′ /

1. A small, dry, one-seeded fruit in which the seed sits free inside the hollow fruit, attached only by the stem of the ovule. Achenes are indehiscent (they do not split open when ripe). The fruits of the sunflower and elm are achenes.

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Other Word Forms

• achenial
  adjective

Etymology

Origin of achene

1835–45; < New Latin achaenium, equivalent to a- a- ⁶ + Greek chain- (stem of chaínein to gape) + Latin -ium -ium

Example Sentences

See Examples For:

achene

Carl Linnaeus was not kidding when he chose the name Ambrosia for it: achene, its nutritious fruit, provides lots of calories to wildlife.

From Scientific American ● Sep. 9, 2011

Ovary 1-celled with a suspended ovule, becoming an achene; calyx none; aquatic herbs, with finely dissected whorled leaves.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Gray, Asa

Spikelets 1–4-flowered, subterete, usually in dense heads; scales oppressed, several-nerved, the lower empty and often persistent after the fall of the rest of the spikelet; joints of the rhachis winged, enclosing the triangular achene.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Gray, Asa

Pappus none, or a cup or crown, or of 2 or 3 awns, teeth, or chaffy scales corresponding with the edges or angles of the achene, often with intervening minute bristles or scales.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Gray, Asa

Annual, twining or procumbent, low, roughish, the joints naked; leaves halberd-heart shaped, pointed; flowers in small interrupted corymbose racemes; outer calyx-lobes keeled; achene smoothish.—Cult. and waste grounds, common.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Gray, Asa

Related Words

• kernel