| SECANT | • secant n. (Geometry) A straight line that intersects a curve at two or more points. • secant n. (Trigonometry) In a right triangle, the reciprocal of the cosine of an angle. Symbol: sec.
 • secant adj. That cuts or divides.
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| SECCOS | • seccos n. Plural of secco. • SECCO n. (Italian) painting on dry plaster.
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| SECEDE | • secede v. (Intransitive) To split from or to withdraw from membership of a political union, an alliance or an organisation. • secede v. (Transitive, uncommon) To split or to withdraw one or more constituent entities from membership of a…
 • SECEDE v. to withdraw formally from an alliance.
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| SECERN | • secern v. (Transitive). • secern v. (Intransitive).
 • SECERN v. to discern as separate.
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| SECESH | • secesh adj. (US, informal, historical) Secessionist, supportive of the Confederacy during the United States Civil War. • secesh n. (US, informal, historical) A secessionist, a supporter of the Confederacy during the United States Civil War.
 • SECESH n. a secessionist, also SECESHER.
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| SECKEL | • Seckel prop.n. A surname. • Seckel n. A small reddish-brown sweet and juicy pear.
 • SECKEL n. a small reddish brown sweet and juicy pear, also SECKLE.
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| SECKLE | • SECKLE n. a small reddish brown sweet and juicy pear, also SECKEL. | 
| SECOND | • second adj. Number-two; following after the first one with nothing between them. The ordinal number corresponding… • second adj. Next to the first in value, power, excellence, dignity, or rank; secondary; subordinate; inferior.
 • second adj. Being of the same kind as one that has preceded; another.
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| SECPAR | • secpar n. (Dated) parsec. • SECPAR n. a unit of astronomical distance, also PARSEC.
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| SECRET | • secret n. (Countable) A piece of knowledge that is hidden and intended to be kept hidden. • secret n. The key or principle by which something is made clear; the knack.
 • secret n. Something not understood or known.
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| SECTOR | • sector n. Section. • sector n. Zone (designated area).
 • sector n. (Geometry) part of a circle, extending to the center; circular sector.
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| SECULA | • secula n. Plural of seculum. • SECULUM n. (Latin) an astronomical or geological age, also SAECULUM.
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| SECUND | • secund adj. (Botany, zoology) Arranged on one side only, as flowers or leaves on a stalk; unilateral. • SECUND adj. esp. of the flowers in an inflorescence, arranged on or directed towards one side only.
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| SECURE | • secure adj. Free from attack or danger; protected. • secure adj. Free from the danger of theft; safe.
 • secure adj. Free from the risk of eavesdropping, interception or discovery; secret.
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