| myotome | <anatomy> A muscular segment; one of the zones into which the muscles of the trunk, especially in fishes, are divided; a myocomma. One of the embryonic muscular segments arising from the protovertebrae; also, one of the protovertebrae themselves. The muscular system of one metamere of an articulate. See: Myotomy. Source: Websters Dictionary (01 Mar 1998) |
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| parachordal | <anatomy> Situated on either side of the notochord; applied especially to the cartilaginous rudiments of the skull on each side of the anterior part of the notochord. A parachordal cartilage. Origin: Pref. Para- + chordal. Source: Websters Dictionary (01 Mar 1998) |
| parachordal cartilage | Cartilage primordia adjacent on either side to the cephalic portion of the notochord in young embryos; they represent an initial step in the formation of the chondrocranium. (05 Mar 2000) |
| parachordal plate | The cartilage primordia of the base of the skull situated on either side of the cephalic part of the notochord. (05 Mar 2000) |