Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Having a combination of features or qualities of two distinct forms.

from The Century Dictionary.

  • Having two forms, bodies, or shapes; double-bodied.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Having two forms, bodies, or shapes.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Having two distinct forms

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective having or combining two forms

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Latin bifōrmis : bi-, two; see bi– + fōrma, form; see form.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

bi- +‎ form

Examples

  • Leaves ternate, from 12 to 20 cm. long; resin-ducts medial or medial and internal, hypoderm biform.

    The Genus Pinus

  • Leaves in fascicles of 3, from 20 to 45 cm. long, rigid; resin-ducts internal, hypoderm biform, endoderm with thin outer walls.

    The Genus Pinus

  • Leaves in fascicles of 3, 4 or 5, not exceeding 24 cm. in length; resin-ducts internal, often with one or two medial ducts, hypoderm biform, endoderm usually with thin outer walls.

    The Genus Pinus

  • Leaves in fascicles of 2 and 3, or more in its southern range, from 12 to 25 cm. long; resin-ducts internal, hypoderm biform, endoderm with thin outer walls.

    The Genus Pinus

  • All the species are of the Western Hemisphere, and among them may be found the biform hypoderm of the leaf, the internal resin-duct, and the total absence of external resin-ducts, characters common in

    The Genus Pinus

  • The biform hypoderm is not always obvious (clausa, Banksiana, etc.) where in some leaves there is but one row of cells.

    The Genus Pinus

  • Leaves ternate or binate, from 10 to 15 cm. long; resin-ducts medial or with an occasional internal duct, hypoderm biform.

    The Genus Pinus

  • Leaves binate, from 2 to 4 cm. long; resin-ducts medial, hypoderm biform.

    The Genus Pinus

  • Leaves in fascicles of 2, from 9 to 12 cm. long; resin-ducts medial, hypoderm weak, sometimes of a single row, biform when of two rows, endoderm with thin outer walls.

    The Genus Pinus

  • Leaves prevalently in fascicles of 3, but varying from 3 to 5, from 10 to 20 cm. long; resin-ducts medial, sometimes with an internal duct, hypoderm biform, endoderm with thick outer walls.

    The Genus Pinus

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