
1) Oven
Found on
https://www.crosswordclues.com/clue/calcar

The calcar, also known as the calcaneum, is the name given to a spur of cartilage arising from inner side of ankle and running along part of outer interfemoral membrane in bats, this is to help spread the interfemoral membrane, which is part of the wing membrane between the tail and the hind legs. This membrane can form a basket or pouch to help c...
Found on
http://en.wikipedia.org/wiki/Calcar

1. a spur or spurlike process projecting from the leg of a bird. 2. a bony or cartilaginous process on the heel bone of bats, which helps to support the portion of the wing membrane lying between the legs (Morris 1992).
Found on
http://imnh.isu.edu/digitalatlas/bio/glsry.htm

furnace or oven for annealing
Found on
http://phrontistery.info/c.html

• (n.) A curved ridge in the floor of the leteral ventricle of the brain; the calcar avis, hippocampus minor, or ergot. • (n.) A kind of oven, or reverberatory furnace, used for the calcination of sand and potash, and converting them into frit. • (n.) A hollow tube or spur at the base of a petal or corolla. • (n.) A spur, or spu...
Found on
http://thinkexist.com/dictionary/meaning/calcar/

1. A small projection from any structure; internal spurs (septa) at the level of division of arteries and confluence of veins when branches or roots form an acute angle. ... See: vascular spur. ... 2. A dull spine or projection from a bone. ... 3. Archaic term for a horny outgrowth from the skin. ... Synonym: spur. ... Origin: L. Spur, cock's spur ...
Found on
http://www.encyclo.co.uk/local/20973

(kal´kәr) spur. a spur-shaped structure.
Found on
http://www.encyclo.co.uk/local/21001

Describes a limestone composed of more or less worn fragments of shells or pieces of older limestone. The particles are generally sand-sized.
Found on
http://www.encyclo.co.uk/local/22047
Cal'car noun ; Latin
plural Calcaria . [ Latin , a spur, as worn on the heel, also the spur of a cock, from
calx ,
calcis , the heel.]
1. (Botany) A hollow tube or spur at the base of a petal or corolla.
2. (Zoology) A slender bony proc...
Found on
http://www.encyclo.co.uk/webster/C/6
Cal'car noun [ Latin
calcaria lime kiln, from
calx ,
calcis , lime. See
Calx .]
(Glass manuf.) A kind of oven, or reverberatory furnace, used for the calcination of sand and potash, and converting them into frit.
Ure. Found on
http://www.encyclo.co.uk/webster/C/6

Type: Term Pronunciation: kal′kar Definitions: 1. A small projection from any structure; internal spurs (septa) at the level of division of arteries and confluence of veins when branches or roots form an acute angle. 2. A dull spine or projection from a bone. Synonyms: spur
Found on
http://www.medilexicon.com/medicaldictionary.php?t=13241

Latin = a spur.
Found on
https://www.encyclo.co.uk/local/21450

A thickened plate of bone near the head of the femur.
Found on
https://www.ioshospital.com/orthopaedics/learnMore/glossaryOfTerms.aspx

In bats a process connected with the calcaneum (heel bone) and extending into the uropatagium near its edge, helping to support the uropatagium (the fold of skin that extends between the leg and tail). A keeled calcar is one with a definite flap of membrane posterior to the calcar extending beyond the general margin of the uropatagium.
Found on
https://www.utep.edu/leb/keys/glossary.htm
No exact match found.