discoid

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discoid

 [dis´koid]
1. disk-shaped.
2. a disklike medicated tablet.
3. a disk-shaped dental excavator designed to remove the carious dentin of a decayed tooth. See illustration.
Discoid. From Dorland's, 2000.

dis·coid

(dis'koyd),
1. Resembling a disk.
2. In dentistry, an excavating or carving instrument having a circular blade with a cutting edge around the periphery.
[disco- + G. eidos, appearance]

discoid

(dĭs′koid′) also

discoidal

(dĭ-skoid′l)
adj.
1. Having a flat, circular form; disk-shaped.
2. Related to or having a disk.
3. Having disk flowers only. Used of a composite flower head.

dis′coid′ n.

dis·coid

(dis'koyd)
1. Resembling a disc.
2. dentistry An excavating or carving instrument having a circular blade with a cutting edge around the periphery.
[disco- + G. eidos, appearance]

dis·coid

(dis'koyd)
1. In dentistry, an excavating or carving instrument with a circular blade with a cutting edge around its periphery.
2. Resembling a disc.
[disco- + G. eidos, appearance]
References in periodicals archive ?
The most parsimonious interpretation for the King Square Formation discoids is that they are inorganic sedimentary structures produced by upward doming and subsequent cracking or bursting of a surface or near-surface bed.
Plan-view shapes include circular (c), subcircular (sc), and ellipsoidal (e) discoids. Grain sizes include mud (sh), very fine (vf), fine (f), medium (m) sand.
Plus d'une centaine de structures radiales et discoides apparaissent au sommet des couches de schiste et de gres tres fins de la formation King Square du Cambrien (Serie 3), du Nouveau-Brunswick, au Canada.