Corona Dentis

[Lat.] ( Zool.) The exposed part of a tooth, which projects beyond the alveolus and gum. Cor'onal, a. Belonging to the crown or cranium of the head. -Relating, or pertaining, to a monarch's crown or coronation; as, "the coronal oath." - Milton. C. suture. ( Anat . ) The crown seam, or serrated junction of the skull with the two parietal or side-bones of the vault. flowers. A crown; a garland; a wreath; as, a coronal of "Crown ye god Bacchus with a coronal." - Spenser. ( Anat .) The frontal bone. Coronaʼmen, n. ( Zool .) The superior margin of a hoof, called in veterinary surgery the coronet. Cor'onary, a . [Lat. coronarius , from corona , a crown.] Relating to a crown, garland, or wreath. Browne. "The coronary spots upon the crown." (Anat.) Resembling a crown or coronal; -applied to some blood-ve els of the heart having a fanciful resemblance to a crown, and called the coronary arteries. -n. A small bone in a horse's foot. Corona'ta, an island in the Adriatic, 20 m. from Zara. It is 15 m. long, and 1 broad, and belongs to Dalmatia. Coronate, Cor'onated, a . Po e ing a crown; wearing a crown or coronet. cluded in the order Lamiacea. Personate, or masked , -resembling the labiate in being divided into two lips; but distinguished by the lower lip being approximated to the upper, so as to close the orifice of the tube-n. or throat. It is seen in the Snap-dragon and Toad-flax. The Calceolate , or slipper - form , which occurs in Calceolaria, is but a slight modification of this form. Ligu late, or strap- shaped , - a tubular C. , partly split open on one side; as in the whole of the florets of the Dandelion, and in the florets of the ray of the Chrysanthemum and Daisy. i form , or glove - shaped , -somewhat bell-shaped, but slightly irregular; as in the Foxglove. The C., whether polypetalous or monopetalous, is subject to various irregularities, arising from the expansion or growing outward of one or more of the petals into proce es of different kinds. Thus, in the Snap-dragon and Valerian, the lower part of the tube becomes dilated on one side, so as to form a little bag, and the C. is then termed saccate or gibbous. Sometimes a petal, or tube of a monopetalous C., becomes prolonged downwards, so as to form a spur. Examples of spurred or calcarate petals or C. may be seen in Heart's-ease, Columbine, Toad-filax, and Red Valerian. On the inner surface of the petals of many flowers there are curious appendages in the form of scales or hairlike proce es. Sometimes these scales are more or le adherent, and form a cup-shaped proce , as in Narci us: to this the term carona is commonly applied, and the C. which exhibits it is said to be crowned. If the C. falls as the flower opens, as in the Grape-vine, it is caducous; if it falls off, as is generally the case, soon after the opening of the flower, it is deciduous . In rare instances it is persistent , and then it usually becomes dry and shrivelled, as in Heaths and Campanulas, and is said to be marcescent. Corolla'ceo us, a. [Fr. corollacé.] Pertaining to a corolla; inclosing and protecting like a wreath.