trifid petals.    From Wordnet, Princeton University. 

The case of the "trifid" nebula in Sagittarius, investigated by Holden in 1877, is less easily disposed of.    From Wordnik.com.  [A Popular History of Astronomy During the Nineteenth Century Fourth Edition] Reference

The upper as well as the lower leaves are trifid, or three-parted.    From Wordnik.com.  [The Field and Garden Vegetables of America Containing Full Descriptions of Nearly Eleven Hundred Species and Varietes; With Directions for Propagation, Culture and Use.] Reference

I had to Google "trifid nebula false color image" to find the original.    From Wordnik.com.  [Where In The Universe Challenge, Thanksgiving Edition | Universe Today] Reference

And this "-a stem with four trifid leaves-" langlorn, which brightens the mind and clears the senses.    From Wordnik.com.  [Three Against The Witch World]

The leaves are triternate, divisions deeply cut and acute; the leaves of the involucrum are stalked, trifid, and deeply cut.    From Wordnik.com.  [Hardy Perennials and Old Fashioned Flowers Describing the Most Desirable Plants, for Borders, Rockeries, and Shrubberies.] Reference

El – Yitm, appeared to be of great height; we all remarked its towering stature and trifid headpiece, apparently upwards of five thousand feet high, before we had heard the tale attached to it.    From Wordnik.com.  [The Land of Midian] Reference

The most important spoon in the Jamestown collection, and one of the most significant objects excavated, is an incomplete pewter spoon -- a variant of the trifid, or split-end, type common during the 1650-90 period.    From Wordnik.com.  [New Discoveries at Jamestown Site of the First Successful English Settlement in America] Reference

Thefe ate named bifid, trifid, &c. accord - ing to the number of jags.    From Wordnik.com.  [The language of botany : being a dictionary of the terms made use of in that science, principally by Linneus ...] Reference

Occasionally two of the arms are replaced by one, and then the projection is trifid.    From Wordnik.com.  [Insectivorous Plants] Reference

Meaning trifid-leaved; but the leaf is really divided into five lobes, not three -- see S. 974, and G. 10.    From Wordnik.com.  [Proserpina, Volume 2 Studies Of Wayside Flowers] Reference

This trifid cross represents a game played by the Hopi with reeds and is depicted on many objects of pottery.    From Wordnik.com.  [Archeological Expedition to Arizona in 1895 Seventeenth Annual Report of the Bureau of American Ethnology to the Secretary of the Smithsonian Institution, 1895-1896, Government Printing Office, Washington, 1898, pages 519-744] Reference

The tarso-metatarsal, or drumstick, exhibits at its distal end a trifid articular surface supporting three toes, as in birds.    From Wordnik.com.  [The Antiquity of Man] Reference

Figure c has at one extremity a trifid appendage, recalling a feather ornament on the head of a bird shown in plate CXXXVIII, a.    From Wordnik.com.  [Archeological Expedition to Arizona in 1895 Seventeenth Annual Report of the Bureau of American Ethnology to the Secretary of the Smithsonian Institution, 1895-1896, Government Printing Office, Washington, 1898, pages 519-744] Reference

When divided, they take the name of Furca, forks or forked prickles; and are called bifid, trifid, &c. from the num - ber of divisions.    From Wordnik.com.  [The language of botany : being a dictionary of the terms made use of in that science, principally by Linneus ...] Reference

The chair, with its bold, outscrolling arms and trifid feet, was recently featured in a traveling exhibition celebrating the 300th anniversary of Franklin's birth.    From Wordnik.com.  [HappyNews - Top Stories] Reference

According to the number ©f thefe divifiens, fuch a leaf is called C L CO called bifid, trifid, quadrifid, quinquefid, multi - fid; or two-cleft, three-cleft, &c. —.    From Wordnik.com.  [The language of botany : being a dictionary of the terms made use of in that science, principally by Linneus ...] Reference

Every claw and phalange has left its mark in the stone; while the trifid termination of the tarso-metatarsal bone leaves three marks more, -- fifteen in all, -- the true ornithic number.    From Wordnik.com.  [The Testimony of the Rocks or, Geology in Its Bearings on the Two Theologies, Natural and Revealed] Reference

But the third cervical vertebræ of the wild and lop-eared rabbits differ more conspicuously when their anterior articular surfaces are compared; for the extremities of the antero-dorsal processes in the wild rabbit are simply rounded, whilst in the lop-eared they are trifid, with a deep central pit.    From Wordnik.com.  [The Variation of Animals and Plants Under Domestication, Vol. I.] Reference

Cassio are ware only of trifid tongues the whispered wilfulness, (’tis demonal!) and sha-dows shadows multiplicating (il folsoletto nel falsoletto col fazzolotto dal fuzzolezzo), to-tients quotients, they tackle their quarrel.    From Wordnik.com.  [Finnegans Wake] Reference

The centre of trifid from Gemini North in Hawaii!.    From Wordnik.com.  [Where In The Universe Challenge, Thanksgiving Edition | Universe Today] Reference

Great many leeved trifid-Jialked Ceylon Dragons.    From Wordnik.com.  [The Universal Botanist and Nurseryman] Reference

Style trifid, stigmas three, acute.    From Wordnik.com.  [The Commercial Products of the Vegetable Kingdom Considered in Their Various Uses to Man and in Their Relation to the Arts and Manufactures; Forming a Practical Treatise & Handbook of Reference for the Colonist, Manufacturer, Merchant, and Consumer, on the Cultivation, Preparation for Shipment, and Commercial Value, &c. of the Various Substances Obtained From Trees and Plants, Entering into the Husbandry of Tropical and Sub-tropical Regions, &c.] Reference