sistroid
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sistroid — [sis′troid΄] adj. [< ?] Math. designating the angle formed by the convex sides of two intersecting curves: opposed to CISSOID … English World dictionary
sistroid — /ˈsɪstrɔɪd/ (say sistroyd) adjective included between the convex sides of two intersecting curves (opposed to cissoid): a sistroid angle. {origin unknown} …
cissoid — /ˈsɪsɔɪd/ (say sisoyd) Geometry –noun 1. a curve having a cusp at the origin and a point of inflection at infinity. –adjective 2. included between the concave sides of two intersecting curves (opposed to sistroid): a cissoid angle. {Greek… …
cissoid — [sis′oid΄] n. [Gr kissoeidēs, ivylike < kissos, ivy + eidos, OID] Math. a curve converging into a pointed tip adj. designating the angle formed by the concave sides of two intersecting curves: opposed to SISTROID … English World dictionary
