| 释义 |
toxaspire Zool.|ˈtɒksəspaɪə(r)|
[irreg. (for *toxospire) f. Gr. τόξο-ν bow + σπεῖρα coil, spire.]
In sponges, a form of microsclere or flesh-spicule: see quots. Hence toxaˈspiral a., pertaining to or of the form of a toxaspire.
1887Sollas in Encycl. Brit. XXII. 417/2 A turn and a part of a turn of a spiral of somewhat higher pitch than that of a sigmaspire gives the toxaspire. 1888― in Challenger Rep. XXV. p. lxii, Toxaspire.—A spiral rod in which the twist a little exceeds a single revolution. The pitch of the spiral is usually great and the spicule consequently appears bow-shaped when viewed laterally. |