SCUTEL´LUM, _n._; pl. _scutella_. Scale. Any one of the divisions into
which the podotheca may be broken up by regular lines of impression;
especially such divisions when large and in regular vertical series;
various smaller divisions being called _reticulations_. _Scutella_ occur
especially on the anterior face of the tarsus and top of the toes; often
also on the back of the tarsus; sometimes they completely encircle the
tarsus. When thus large, some ornithologists call them _scuta_; then
using _scutella_ for the smaller irregular reticulations. _Scutella_ are
sometimes obsolete. (Commonly, but erroneously, written _scutellæ_.)
(109.)
SCU´TIFORM, _a._ Scalelike.
SCU´TUM, _n._; pl. _scuta_. See SCUTELLUM.
SEC´ONDARY COV´ERTS. The smaller wing-feathers growing from the forearm
and its region, overlying the bases of the secondary quills. (89.)
SEC´ONDARY QUILLS or SEC´ONDARIES. Quills growing upon the forearm.
SEG´MENT, _n._ A portion specially distinguished. The tarsus is a
_segment_ of the leg.
SEGMENTA´TION, _n._ Division into parts. Particularly applied to a
process which takes place in the vitellus or yolk during incubation.
SEL´LA TUR´CICA, _n._ A certain part of the sphenoid bone.
SE´MEN, _n._ The male fluid, containing spermatozoa.
SEMI- (_in composition_). Half.
SEMILU´NAR, _a._ Crescentic.
SEMIMEMBRANO´SUS, _n._ A certain muscle of the thigh.
SEM´INAL, _a._ Pertaining to the male generative fluid.
SEMINIF´EROUS, _a._ Secreting or conveying semen.
SEMIPAL´MATE, _a._ Half webbed; having a basal membrane between the
front toes not reaching to their ends.
SEM´IPLUME, _n._ Feather with pennaceous stem and plumulaceous web.
SEMITENDINO´SUS, _n._ A certain muscle of the thigh.
SE´NILE, _a._ Aged; pertaining to old age.
SENSE, _n._ Faculty of apprehending external impressions; as, _sense_ of
sight, hearing.
SEN´SORY, _a._ Relating to the senses.
SEP´TUM, _n._ A partition. Same as _Dissepiment_.
SE´ROUS, _a._ Thin, watery (of fluids).
SER´RATE, _a._ Toothed, like a saw.
SERRA´TUS, _a._ for _n._ A muscle of the trunk.
SE´RUM, _n._ Watery portion of animal fluids, especially of the blood.
SES´AMOID (_bone_), _n._ A small rotund bone situate in the substance of
a tendon about a joint.
SES´SILE, _a._ Seated; i.e. without a stem or peduncle.
SETA´CEOUS, _a._ Bristly; bristled.
SE´TÆ, _n. pl._ Bristles.
SE´TIFORM, _a._ Bristle-like.
SEX´UAL, _a._ Pertaining to sex.
SEX´US, _n._ Sex.